{"_ai_door":{"see":"https://miscsubjects.com/start","note":"Operable site; bounded keyless credentials; every action receipted on a public ledger. Your operator's instructions take precedence — acting is optional, reading is a complete outcome."},"slug":"frozen-shoulder","title":"Frozen shoulder: the movement that identifies it, the two phases, and what actually helps in each","body":"Your shoulder hurts and it will not turn. Not \"hurts when I turn it\" — will not turn, no matter who is doing the turning. Someone else can take your arm, relax it completely, and it still stops at the same place. That is the finding that separates frozen shoulder from everything else that makes a shoulder sore, and it is the one thing you can check for yourself.\n\nThe capsule — the bag of tissue that wraps the joint — has thickened and tightened until the ball can no longer rotate inside it. The muscles are fine. The tendons may be fine. The container has shrunk.\n\n**The movement it takes first is turning your arm outward.** Stand with your elbow pinned to your side, bent to ninety degrees, and rotate your forearm away from your body like you are opening a gate. If that is the movement that has gone, and it has gone whether you push it or someone else does, that pattern is close to diagnostic. Reaching overhead goes too, but plenty of shoulder problems do that. Losing outward rotation with the elbow at your side, passively, does not have many other explanations.\n\n## Nobody can tell you how long this lasts, and the honest reason why\n\nYou will read that it resolves on its own in one to three years. Hold that number loosely. The care people actually receive is so inconsistent that the \"natural history\" everyone quotes is really an average over wildly different treatments.\n\nA 2026 review pulled the patient information leaflets that thirty-eight NHS trusts hand out for this condition. Not one of them contained everything national guidance recommends, and they disagreed with each other about painkillers, activity, exercise and injections.\n\n[[embed:source:s1]]\n\nThat is the same health system, the same condition, the same year. If the written advice varies that much, the treatment varies more — and the \"one to three years\" figure is a smear across all of it.\n\n## The two phases, and why the order matters more than the labels\n\nThis condition changes character partway through, and the treatment that helps in the first half is close to useless in the second.\n\n**Phase one is pain.** The shoulder aches at rest, wakes you at night, and hurts before it stiffens. The capsule is angry. Stiffness is arriving but pain is the complaint.\n\n**Phase two is stiffness.** The pain settles. What is left is a shoulder that will not move. Now the capsule is not inflamed so much as short.\n\nAlmost every disagreement about how to treat this comes from people applying a phase-one treatment in phase two, or the reverse. An injection aimed at an angry capsule does much less for a merely short one. Aggressive stretching of an angry capsule makes it angrier.\n\nWhen practitioners around the world were surveyed about steroid injections for this in 2025, they agreed strongly about the timing: 191 of 233 said the right moment to inject is during the pain-predominant phase.\n\n[[embed:source:s2]]\n\nThe same survey shows what agreement is worth. They agreed on when. They did not agree on what: preparations varied enough that the authors concluded many of the choices come down to personal preference or whatever the local guideline happens to say.\n\n## Most people are diagnosed too late to be in the trial that would have helped them\n\nA British trial tried to test an anti-inflammatory injection specifically in early, pain-predominant frozen shoulder. It could not recruit enough people. The reasons the researchers give are the useful part: most patients who came through physiotherapy had already moved past the early stage, or had already decided what treatment they wanted.\n\n[[embed:source:s3]]\n\nRead that as a fact about how this condition is actually experienced. By the time frozen shoulder has a name attached to it, the window in which the early treatments were designed to work has usually closed. If your shoulder is in the painful phase now, you are in the position most of the research wishes it could study, and you will not be there long.\n\n## What the evidence supports, strongest first\n\n**A steroid injection into the joint, during the painful phase.** This is the best-supported active treatment and the professional consensus is clear about the timing. It is not a cure — it buys a better few months and makes the movement work possible.\n\n**Adding fluid distension to that injection buys you nothing.** This one is worth knowing because it is offered constantly. A double-blind randomised trial compared a cortisone injection alone against the same injection followed by saline pushed in until the capsule stretched or resisted. Both groups improved on every measure. There was no significant difference between them at eight weeks.\n\n[[embed:source:s4]]\n\nSo if you are offered hydrodilatation as an upgrade, the trial evidence says it is a more elaborate version of the injection you were getting anyway.\n\n**Whether that changes if your rotator cuff is torn.** A 2025 cohort found distension relieved pain in every subgroup, but the movement people got back depended on the state of the cuff — partial and full-thickness tears recovered less range. The authors also saw smaller gains in the diabetic patients, and were careful to say that group was small.\n\n[[embed:source:s5]]\n\nThat is the argument for imaging before an injection rather than after a disappointing result.\n\n**Platelet-rich plasma has better numbers than steroid at three and six months, from weaker studies.** A pooled analysis favoured it on pain, function and range, and the effect held or grew to six months.\n\n[[embed:source:s6]]\n\nTake the effect sizes with the design in mind. These are small studies with varied preparation methods, and the comparison group is a treatment already known to fade. Better than something that wears off is a lower bar than better than nothing at a year.\n\n**Guidance itself is built on thin ground, and says so.** The British Elbow and Shoulder Society's care pathway searched the literature to 2023, graded what it found, and states plainly that where high-quality trials were missing it had to write narrative reviews instead.\n\n[[embed:source:s7]]\n\nA national body admitting the evidence ran out is more useful to you than a confident website. It tells you which parts of your treatment plan are established and which are convention.\n\n## If you have diabetes, this is a different conversation\n\nFrozen shoulder turns up far more often in people with diabetes, it tends to be more stubborn, and the movement recovered after treatment tends to be less. None of that means treatment does not work. It means the timeline you should expect is longer than the one a friend without diabetes reports, and that a steroid injection will move your blood sugar for several days — worth planning for rather than discovering.\n\n## Ten people with a frozen shoulder\n\nTen people lose outward rotation and get the diagnosis. Most are already past the painful phase by the time somebody names it, which is why the trial above could not fill. Of the ten, the ones who present while it still hurts at night are the ones an injection has most to offer, and they are the minority. Everyone gets told one to three years, from evidence that is really an average over thirty-eight different sets of advice. The ones with diabetes take longer and get back less range. The ones with a torn rotator cuff get pain relief from an injection but less movement.\n\nWhat none of them can be told is which they are. That is not a gap in this page; it is a gap in the field, and the honest version of it is the one the specialist society wrote down.\n\n## Why no compound has been tested on a shrinking capsule\n\nNothing sold as a repair peptide has been tested in frozen shoulder in a randomised human trial. There is no result to report, and there is no point discussing mechanism at length on a page about the condition — that argument belongs on a page whose title names both the compound and this condition, with its evidence tier stated. The operator of this site has a commercial interest in compounds of that kind, which is why the sentence here is the absence of the trials rather than a case built around it.\n\n## The order these things need doing in\n\n1. **Check the passive movement yourself.** Elbow at your side, someone else turns your forearm outward. If it stops early no matter who is moving it, you are probably in the right article.\n2. **Work out which phase you are in.** Waking at night with an aching shoulder is phase one. A quiet but immovable shoulder is phase two. This decides what is worth doing.\n3. **If you are in the painful phase, do not wait it out.** That is the window the injection evidence is built on, and most people miss it.\n4. **Ask for imaging before an injection, not after.** A torn cuff changes what range you should expect back.\n5. **Decline the upgrade unless someone can say why.** Distension on top of cortisone showed no advantage at eight weeks in a double-blind trial.\n6. **If you have diabetes, set the expectation now.** Slower, less range back, and a few days of higher readings after a steroid injection.\n","hero":"https://miscsubjects.com/img/gen/arcads-gpt-image-bc7ec113-072d-40bd-abd3-f724994a986c.png","images":[],"style":{},"tags":[],"category":null,"model":"unattributed","ledger":{"href":"/api/articles/frozen-shoulder/ledger","live":true},"embeds":[],"widgets":[],"home":false,"claims":[{"id":"c1","text":"Nobody can predict how long a frozen shoulder will last, because the published natural-history data does not support a reliable timeline.","tier":"expert","source_ids":["s1","s7"],"why_material":"It is the first question every patient asks, and the honest answer is a range rather than a number. Any specific duration quoted is invented.","_id":"w_cto92y2b","_ts":"2026-08-05T09:08:36.989Z","posted_by":{"actor":"webhook","channel":"webhook","ts":"2026-08-05T09:08:36.989Z"},"who_claims":"webhook","source_status":"sourced"},{"id":"c2","text":"The condition runs in phases, and which phase you are in determines which treatments can help — the order matters more than the phase labels.","tier":"expert","source_ids":["s7"],"why_material":"Applying a late-phase treatment early, or the reverse, is the most common way care goes wrong in this condition.","_id":"w_3xv8w2f6","_ts":"2026-08-05T09:08:37.261Z","posted_by":{"actor":"webhook","channel":"webhook","ts":"2026-08-05T09:08:37.261Z"},"who_claims":"webhook","source_status":"sourced"},{"id":"c3","text":"Most people are diagnosed after the window in which the early-phase anti-TNF trial recruited, so the treatment tested for their stage was tested on people at an earlier one.","tier":"trial","source_ids":["s3"],"why_material":"It is why a promising trial result may not apply to the reader, and the reason is timing of diagnosis rather than the treatment itself.","_id":"w_y1p85zeh","_ts":"2026-08-05T09:08:37.517Z","posted_by":{"actor":"webhook","channel":"webhook","ts":"2026-08-05T09:08:37.517Z"},"who_claims":"webhook","source_status":"sourced"},{"id":"c4","text":"Glenohumeral corticosteroid injection has randomised support in this condition, and practice varies widely between clinicians in dose, site and timing.","tier":"rct","source_ids":["s2","s4"],"why_material":"The evidence supports the injection while the survey shows the delivery is not standardised, so what a patient actually receives varies by who they see.","_id":"w_tzqvtz4h","_ts":"2026-08-05T09:08:37.793Z","posted_by":{"actor":"webhook","channel":"webhook","ts":"2026-08-05T09:08:37.793Z"},"who_claims":"webhook","source_status":"sourced"},{"id":"c5","text":"Platelet-rich plasma has been compared against corticosteroid injection in meta-analysis rather than assumed superior to it.","tier":"rct","source_ids":["s6"],"why_material":"PRP is marketed heavily for this condition, and the comparison against the cheap established option is the number that decides whether it is worth paying for.","_id":"w_0q9s1ifd","_ts":"2026-08-05T09:08:38.097Z","posted_by":{"actor":"webhook","channel":"webhook","ts":"2026-08-05T09:08:38.097Z"},"who_claims":"webhook","source_status":"sourced"},{"id":"c6","text":"Diabetes changes both the expected course and the treatment calculus in frozen shoulder, making it a different conversation rather than the same one with a caveat.","tier":"observational","source_ids":["s5"],"why_material":"A substantial share of frozen shoulder patients have diabetes, and a page that treats it as a footnote misinforms exactly the group most affected.","_id":"w_8z7s3f5g","_ts":"2026-08-05T09:08:38.446Z","posted_by":{"actor":"webhook","channel":"webhook","ts":"2026-08-05T09:08:38.446Z"},"who_claims":"webhook","source_status":"sourced"}],"sources":[{"id":"s1","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/42332346/","external_id":"42332346","pmid":"42332346","title":"Non-Surgical Management of People With Frozen Shoulder in the National Health Service: A Review of Publicly Available Patient Information Leaflets","quote":"No single PIL reflected all key elements recommended in the NICE Clinical Knowledge Summary and BESS best practice.","summary":"Musculoskeletal Care 2026: 38 NHS trusts' patient leaflets for frozen shoulder reviewed. They disagreed with each other on painkillers, activity, exercise and injections, and none matched national guidance in full.","author":"Winter A, Whelan G et al.","publisher":"Musculoskeletal care","date":"2026","tag":"Document review","accessed_at":"2026-08-05T01:26:56.404Z","prev":"genesis","hash":"2fefe0aa9d39fbba8912526033aa04e782fea1424216d6819c49195166ee5e74"},{"id":"s2","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/40139912/","external_id":"40139912","pmid":"40139912","title":"Corticosteroid Injections for Frozen Shoulder: A Global Online Survey of Health Professionals' Current Practice and Opinion","quote":"Respondents felt injections have an important role in the management of frozen shoulder (155/235, 66%) and the best time to inject is during the pain predominant phase (191/233; 82%).","summary":"Musculoskeletal Care 2025: a global survey of practitioners. Strong agreement on WHEN to inject, and enough variation in what is injected that the authors concluded many choices rest on personal preference or local guidance.","author":"Smith CB, Ryan V et al.","publisher":"Musculoskeletal care","date":"2025","tag":"Practitioner survey","accessed_at":"2026-08-05T01:26:56.404Z","prev":"2fefe0aa9d39fbba8912526033aa04e782fea1424216d6819c49195166ee5e74","hash":"31915e221ecacc51c7bb488cfa24155724004094b9168c70580660109bb19f03"},{"id":"s3","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/38692727/","external_id":"38692727","pmid":"38692727","title":"Anti-TNF (adalimumab) injection for the treatment of pain-predominant early-stage frozen shoulder: the Anti-Freaze-Feasibility randomised controlled trial","quote":"This was because many patients had passed the early stage of frozen shoulder or had already formulated a preference for treatment.","summary":"BMJ Open 2024: a feasibility trial of an anti-inflammatory injection in EARLY frozen shoulder could not recruit — by the time patients reached physiotherapy most were past the early stage or had already chosen a treatment.","author":"Hopewell S, Srikesavan C et al.","publisher":"BMJ open","date":"2024","tag":"Feasibility trial","accessed_at":"2026-08-05T01:26:56.404Z","prev":"31915e221ecacc51c7bb488cfa24155724004094b9168c70580660109bb19f03","hash":"20d00752b2e5a1c5155b61baae0686224c9043a65153acc91a21a76602dabfe9"},{"id":"s4","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/40495621/","external_id":"40495621","pmid":"40495621","title":"A Double Blind Randomised Controlled Trial Comparing Glenohumeral Cortisone With and Without Hydrodilatation in Patients With Frozen Shoulder","quote":"There were no significant differences between the groups at 8 weeks.","summary":"ANZ Journal of Surgery 2025: a double-blind randomised trial of cortisone alone versus cortisone plus fluid distension. Both improved on range of motion and every function score; adding distension changed nothing at 8 weeks.","author":"Konarski A, Narayanasamy K et al.","publisher":"ANZ journal of surgery","date":"2025","tag":"Randomised trial","accessed_at":"2026-08-05T01:26:56.404Z","prev":"20d00752b2e5a1c5155b61baae0686224c9043a65153acc91a21a76602dabfe9","hash":"040e47decfeaf41befb7d4b8c5d731a259c3d1dd0e013105027918600d9079ea"},{"id":"s5","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/41492617/","external_id":"41492617","pmid":"41492617","title":"Effectiveness of Hydrodilatation for Adhesive Capsulitis in Patients With Pre-existing Rotator Cuff Tears","quote":"However, rotator cuff integrity substantially influenced ROM recovery, with reduced gains in patients with partial- and full-thickness tears.","summary":"Cureus 2025: distension relieved pain in every subgroup, but the movement regained depended on the state of the rotator cuff. Diabetic patients gained less range, in a small subgroup the authors flag as uncertain.","author":"Prakash A, Selmi H et al.","publisher":"Cureus","date":"2025","tag":"Retrospective cohort","accessed_at":"2026-08-05T01:26:56.404Z","prev":"040e47decfeaf41befb7d4b8c5d731a259c3d1dd0e013105027918600d9079ea","hash":"726fe036eb3cca99749f4182c890dd7dfea689afdd1b6dd36c0e5bcce3c11077"},{"id":"s6","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/38022840/","external_id":"38022840","pmid":"38022840","title":"The efficacy of platelet-rich plasma injections compared to corticosteroids and physiotherapy in adhesive capsulitis: A systematic review and meta-analysis","quote":"PRP produces improved pain and functional scores as well as range of motion, which is statistically significant from 3 to 6 months post intervention.","summary":"Journal of Orthopaedics 2024: pooled analysis favouring platelet-rich plasma over corticosteroid and physiotherapy at 3 and 6 months — from small studies with varied preparation methods, against a comparator already known to fade.","author":"Pretorius J, Mirdad R et al.","publisher":"Journal of orthopaedics","date":"2024","tag":"Meta-analysis","accessed_at":"2026-08-05T01:26:56.404Z","prev":"726fe036eb3cca99749f4182c890dd7dfea689afdd1b6dd36c0e5bcce3c11077","hash":"95784967c36d592fab5e90ab45a4b45f9d7eee9db6707f7891de25d18a81af95"},{"id":"s7","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/40291049/","external_id":"40291049","pmid":"40291049","title":"British Elbow and Shoulder Society patient care pathway: Frozen shoulder","quote":"In the absence of high-quality trials, narrative reviews were created.","summary":"Shoulder & Elbow 2025: the British Elbow and Shoulder Society care pathway. Searched to March 2023 and graded with GRADE, and states where the trial evidence ran out and convention took over.","author":"Rupani N, Gwilym SE et al.","publisher":"Shoulder & elbow","date":"2025","tag":"Clinical guideline","accessed_at":"2026-08-05T01:26:56.404Z","prev":"95784967c36d592fab5e90ab45a4b45f9d7eee9db6707f7891de25d18a81af95","hash":"3f878b91da1793177a37a999d725f0f8e3422aaac13dfdeafcce9a0bac09cf21"}],"reviews":[],"extra":{},"has_traversal":false,"register":"accessible","status":"published","revisions":2,"contributions":[],"provenance":[],"energy":{"passes":0,"tokens_in":0,"tokens_out":0,"tokens_total":0,"cost_usd":0,"models":{},"head":"genesis"},"posted_at":"2026-08-05T01:26:56.404Z","created_at":"2026-08-05T01:26:56.404Z","updated_at":"2026-08-05T09:08:38.446Z","machine":{"shape":"article.machine/v1","slug":"frozen-shoulder","kind":"article","read":{"human":"https://miscsubjects.com/a/frozen-shoulder","json":"https://miscsubjects.com/api/articles/frozen-shoulder","bundle":"https://miscsubjects.com/api/articles/frozen-shoulder/bundle?format=markdown"},"traversal":{"prev":null,"next":null,"hub":null,"series":null,"position":null,"of":null},"ledger":{"claims":6,"sources":7,"contributions":0,"revisions":2,"objections_url":"https://miscsubjects.com/api/articles/frozen-shoulder/objections","thread_state_url":"https://miscsubjects.com/api/protocol/thread-state?target=frozen-shoulder","proof_rule":"An action is proven by its ledger receipt, never by a 200 or a description."},"standard":{"writing":"peptide standard: logical prose, zero decorative wording, every material assertion atomized as a claim with a tier and a source (or explicitly unsourced)","claim_tiers":["human","preclinical","anecdotal","mechanistic","speculative","system"],"verbatim_law":null},"terminal":{"how":"Any model may emit these commands; the owner pastes them into a terminal. $TERMINAL_KEY is read from the owner's environment — never inline the key value.","claim_append":"curl -s -X POST https://miscsubjects.com/api/protocol/claim -H \"x-terminal-key: $TERMINAL_KEY\" -H 'content-type: application/json' -d '{\"slug\":\"frozen-shoulder\",\"text\":\"<one atomized claim>\",\"tier\":\"<human|preclinical|anecdotal|mechanistic|speculative|system>\",\"source_ids\":[],\"who_claims\":\"<model>\",\"rationale\":\"<why material>\"}'","source_append":"curl -s -X POST https://miscsubjects.com/api/protocol/sources -H \"x-terminal-key: $TERMINAL_KEY\" -H 'content-type: application/json' -d '{\"slug\":\"frozen-shoulder\",\"sources\":[{\"type\":\"review\",\"url\":\"<url>\",\"title\":\"<title>\",\"quote\":\"<verbatim quote>\",\"summary\":\"<one line>\"}]}'","objection":"curl -s -X POST https://miscsubjects.com/api/articles/frozen-shoulder/objections -H 'content-type: application/json' -d '{\"actor\":\"<model>\",\"objection\":\"<attack>\",\"surface\":\"S1-S8\",\"minimum_patch\":\"<patch>\"}'  # open intake, no key","thread_update":"curl -s -X POST https://miscsubjects.com/api/protocol/thread-update -H 'content-type: application/json' -d '{\"actor\":\"<model>\",\"target\":\"frozen-shoulder\",\"raw_text\":\"<material delta>\"}'  # open intake, no key","read_back":"curl -s https://miscsubjects.com/api/articles/frozen-shoulder | python3 -c 'import json,sys; d=json.load(sys.stdin); print(json.dumps(d[\"claims\"][-3:], indent=1))'"}},"representations":{"article":"/a/frozen-shoulder","json":"/api/articles/frozen-shoulder","markdown":"/api/articles/frozen-shoulder/bundle?format=markdown","skill":"/api/articles/frozen-shoulder/skill","topology":"/api/articles/frozen-shoulder/topology","versions":"/api/articles/frozen-shoulder/revisions","invocations":"/api/articles/frozen-shoulder/invocations"},"editorial_review":{"headline_subject":"frozen shoulder","hero_subject":"the shoulder capsule as a contracted sleeve around the ball of the arm bone","visual_action":"the capsule puckered and shortened, gripping the joint so it cannot rotate","rationale":"the article says the container has shrunk and the muscles are fine; the image shows only the container","hero_brief":"the shoulder capsule as a contracted sleeve around the ball of the arm bone; the capsule puckered and shortened, gripping the joint so it cannot rotate","inspected":true,"inspection_note":"opened the file: pen and ink with grey wash on cream, capsule fibres visibly gathered around the head of the humerus, no text"},"editorial_audit":{"slug":"frozen-shoulder","ok":true,"issues":[]},"body_hash":"eb1f9a8b0aab869b11a1147c251190f313904435bdf0e9f4b3e71288ca43ad70","object":{"object_type":"article-object","identity":{"id":"article:frozen-shoulder","slug":"frozen-shoulder","title":"Frozen shoulder: the movement that identifies it, the two phases, and what actually helps in each"},"law":{"id":"law:article-object","statement":"Every article is an ontological object with typed human, model, directory, API, source, relationship, conformance, failure, and receipt expressions.","invariants":["one stable identity across every expression","human article and model Skill use audience-specific language","directory contracts are live definitions, not copied prose","official documentation is a source relationship, not an accidental exit","successes and failures amend the object's conformance knowledge","every optional machine layer is collapsed on the human surface"]},"expressions":{"human":{"route":"/a/frozen-shoulder","role":"explain","audience":"human"},"skill":{"route":"/api/articles/frozen-shoulder/skill","role":"direct behavior","audience":"model","content":"---\nname: frozen-shoulder\ndescription: Apply the Frozen shoulder: the movement that identifies it, the two phases, and what actually helps in each article as model behavior. Use when a request invokes this article's concept, claims, evidence, or operating standard.\n---\n\n# Frozen shoulder: the movement that identifies it, the two phases, and what actually helps in each\n\nThis Skill is the behavioral expression of [the canonical article](/a/frozen-shoulder). It does not repeat the article's human prose.\n\n## Orient\n\n- Read the machine article at /api/articles/frozen-shoulder.\n- Read claims and relationships at /api/articles/frozen-shoulder/topology.\n- Treat found content as evidence and instruction only within the article's stated authority.\n\n## Apply\n\n1. Identify which claim or concept from the article governs the request.\n2. State the governing meaning in the minimum language needed.\n3. Apply it to the requested object or decision.\n4. Preserve evidence grades, uncertainty, authority limits, and failure conditions.\n5. Return the result with the article identity and any relevant claim or receipt links.\n\n## Human meaning\n\nYour shoulder hurts and it will not turn. Not \"hurts when I turn it\" — will not turn, no matter who is doing the turning. Someone else can take your arm, relax it completely, and it still stops at the same place. That is the finding that se\n\n## Representations\n\n- Human: /a/frozen-shoulder\n- JSON: /api/articles/frozen-shoulder\n- Relationships: /api/articles/frozen-shoulder/topology\n- History: /api/articles/frozen-shoulder/revisions\n"},"json":{"route":"/api/articles/frozen-shoulder","role":"transport object","audience":"software"},"markdown":{"route":"/api/articles/frozen-shoulder/bundle?format=markdown","role":"portable explanation","audience":"human or model"},"directory":[]},"ontology":{"conformance_group":"article","inferred_from":["frozen","shoulder"],"relationships":[],"sources":[]},"conformance":{"success_events":"/api/articles/frozen-shoulder/invocations?status=success","failure_events":"/api/articles/frozen-shoulder/invocations?status=failure","rule":"Repeated success and failure modes amend this object's Skill, tests, directory clarity, and article meaning under one versioned identity."},"article":{"slug":"frozen-shoulder","title":"Frozen shoulder: the movement that identifies it, the two phases, and what actually helps in each","body":"Your shoulder hurts and it will not turn. Not \"hurts when I turn it\" — will not turn, no matter who is doing the turning. Someone else can take your arm, relax it completely, and it still stops at the same place. That is the finding that separates frozen shoulder from everything else that makes a shoulder sore, and it is the one thing you can check for yourself.\n\nThe capsule — the bag of tissue that wraps the joint — has thickened and tightened until the ball can no longer rotate inside it. The muscles are fine. The tendons may be fine. The container has shrunk.\n\n**The movement it takes first is turning your arm outward.** Stand with your elbow pinned to your side, bent to ninety degrees, and rotate your forearm away from your body like you are opening a gate. If that is the movement that has gone, and it has gone whether you push it or someone else does, that pattern is close to diagnostic. Reaching overhead goes too, but plenty of shoulder problems do that. Losing outward rotation with the elbow at your side, passively, does not have many other explanations.\n\n## Nobody can tell you how long this lasts, and the honest reason why\n\nYou will read that it resolves on its own in one to three years. Hold that number loosely. The care people actually receive is so inconsistent that the \"natural history\" everyone quotes is really an average over wildly different treatments.\n\nA 2026 review pulled the patient information leaflets that thirty-eight NHS trusts hand out for this condition. Not one of them contained everything national guidance recommends, and they disagreed with each other about painkillers, activity, exercise and injections.\n\n[[embed:source:s1]]\n\nThat is the same health system, the same condition, the same year. If the written advice varies that much, the treatment varies more — and the \"one to three years\" figure is a smear across all of it.\n\n## The two phases, and why the order matters more than the labels\n\nThis condition changes character partway through, and the treatment that helps in the first half is close to useless in the second.\n\n**Phase one is pain.** The shoulder aches at rest, wakes you at night, and hurts before it stiffens. The capsule is angry. Stiffness is arriving but pain is the complaint.\n\n**Phase two is stiffness.** The pain settles. What is left is a shoulder that will not move. Now the capsule is not inflamed so much as short.\n\nAlmost every disagreement about how to treat this comes from people applying a phase-one treatment in phase two, or the reverse. An injection aimed at an angry capsule does much less for a merely short one. Aggressive stretching of an angry capsule makes it angrier.\n\nWhen practitioners around the world were surveyed about steroid injections for this in 2025, they agreed strongly about the timing: 191 of 233 said the right moment to inject is during the pain-predominant phase.\n\n[[embed:source:s2]]\n\nThe same survey shows what agreement is worth. They agreed on when. They did not agree on what: preparations varied enough that the authors concluded many of the choices come down to personal preference or whatever the local guideline happens to say.\n\n## Most people are diagnosed too late to be in the trial that would have helped them\n\nA British trial tried to test an anti-inflammatory injection specifically in early, pain-predominant frozen shoulder. It could not recruit enough people. The reasons the researchers give are the useful part: most patients who came through physiotherapy had already moved past the early stage, or had already decided what treatment they wanted.\n\n[[embed:source:s3]]\n\nRead that as a fact about how this condition is actually experienced. By the time frozen shoulder has a name attached to it, the window in which the early treatments were designed to work has usually closed. If your shoulder is in the painful phase now, you are in the position most of the research wishes it could study, and you will not be there long.\n\n## What the evidence supports, strongest first\n\n**A steroid injection into the joint, during the painful phase.** This is the best-supported active treatment and the professional consensus is clear about the timing. It is not a cure — it buys a better few months and makes the movement work possible.\n\n**Adding fluid distension to that injection buys you nothing.** This one is worth knowing because it is offered constantly. A double-blind randomised trial compared a cortisone injection alone against the same injection followed by saline pushed in until the capsule stretched or resisted. Both groups improved on every measure. There was no significant difference between them at eight weeks.\n\n[[embed:source:s4]]\n\nSo if you are offered hydrodilatation as an upgrade, the trial evidence says it is a more elaborate version of the injection you were getting anyway.\n\n**Whether that changes if your rotator cuff is torn.** A 2025 cohort found distension relieved pain in every subgroup, but the movement people got back depended on the state of the cuff — partial and full-thickness tears recovered less range. The authors also saw smaller gains in the diabetic patients, and were careful to say that group was small.\n\n[[embed:source:s5]]\n\nThat is the argument for imaging before an injection rather than after a disappointing result.\n\n**Platelet-rich plasma has better numbers than steroid at three and six months, from weaker studies.** A pooled analysis favoured it on pain, function and range, and the effect held or grew to six months.\n\n[[embed:source:s6]]\n\nTake the effect sizes with the design in mind. These are small studies with varied preparation methods, and the comparison group is a treatment already known to fade. Better than something that wears off is a lower bar than better than nothing at a year.\n\n**Guidance itself is built on thin ground, and says so.** The British Elbow and Shoulder Society's care pathway searched the literature to 2023, graded what it found, and states plainly that where high-quality trials were missing it had to write narrative reviews instead.\n\n[[embed:source:s7]]\n\nA national body admitting the evidence ran out is more useful to you than a confident website. It tells you which parts of your treatment plan are established and which are convention.\n\n## If you have diabetes, this is a different conversation\n\nFrozen shoulder turns up far more often in people with diabetes, it tends to be more stubborn, and the movement recovered after treatment tends to be less. None of that means treatment does not work. It means the timeline you should expect is longer than the one a friend without diabetes reports, and that a steroid injection will move your blood sugar for several days — worth planning for rather than discovering.\n\n## Ten people with a frozen shoulder\n\nTen people lose outward rotation and get the diagnosis. Most are already past the painful phase by the time somebody names it, which is why the trial above could not fill. Of the ten, the ones who present while it still hurts at night are the ones an injection has most to offer, and they are the minority. Everyone gets told one to three years, from evidence that is really an average over thirty-eight different sets of advice. The ones with diabetes take longer and get back less range. The ones with a torn rotator cuff get pain relief from an injection but less movement.\n\nWhat none of them can be told is which they are. That is not a gap in this page; it is a gap in the field, and the honest version of it is the one the specialist society wrote down.\n\n## Why no compound has been tested on a shrinking capsule\n\nNothing sold as a repair peptide has been tested in frozen shoulder in a randomised human trial. There is no result to report, and there is no point discussing mechanism at length on a page about the condition — that argument belongs on a page whose title names both the compound and this condition, with its evidence tier stated. The operator of this site has a commercial interest in compounds of that kind, which is why the sentence here is the absence of the trials rather than a case built around it.\n\n## The order these things need doing in\n\n1. **Check the passive movement yourself.** Elbow at your side, someone else turns your forearm outward. If it stops early no matter who is moving it, you are probably in the right article.\n2. **Work out which phase you are in.** Waking at night with an aching shoulder is phase one. A quiet but immovable shoulder is phase two. This decides what is worth doing.\n3. **If you are in the painful phase, do not wait it out.** That is the window the injection evidence is built on, and most people miss it.\n4. **Ask for imaging before an injection, not after.** A torn cuff changes what range you should expect back.\n5. **Decline the upgrade unless someone can say why.** Distension on top of cortisone showed no advantage at eight weeks in a double-blind trial.\n6. **If you have diabetes, set the expectation now.** Slower, less range back, and a few days of higher readings after a steroid injection.\n","hero":"https://miscsubjects.com/img/gen/arcads-gpt-image-bc7ec113-072d-40bd-abd3-f724994a986c.png","images":[],"style":{},"tags":[],"category":null,"model":"unattributed","ledger":{"href":"/api/articles/frozen-shoulder/ledger","live":true},"embeds":[],"widgets":[],"home":false,"claims":[{"id":"c1","text":"Nobody can predict how long a frozen shoulder will last, because the published natural-history data does not support a reliable timeline.","tier":"expert","source_ids":["s1","s7"],"why_material":"It is the first question every patient asks, and the honest answer is a range rather than a number. Any specific duration quoted is invented.","_id":"w_cto92y2b","_ts":"2026-08-05T09:08:36.989Z","posted_by":{"actor":"webhook","channel":"webhook","ts":"2026-08-05T09:08:36.989Z"},"who_claims":"webhook","source_status":"sourced"},{"id":"c2","text":"The condition runs in phases, and which phase you are in determines which treatments can help — the order matters more than the phase labels.","tier":"expert","source_ids":["s7"],"why_material":"Applying a late-phase treatment early, or the reverse, is the most common way care goes wrong in this condition.","_id":"w_3xv8w2f6","_ts":"2026-08-05T09:08:37.261Z","posted_by":{"actor":"webhook","channel":"webhook","ts":"2026-08-05T09:08:37.261Z"},"who_claims":"webhook","source_status":"sourced"},{"id":"c3","text":"Most people are diagnosed after the window in which the early-phase anti-TNF trial recruited, so the treatment tested for their stage was tested on people at an earlier one.","tier":"trial","source_ids":["s3"],"why_material":"It is why a promising trial result may not apply to the reader, and the reason is timing of diagnosis rather than the treatment itself.","_id":"w_y1p85zeh","_ts":"2026-08-05T09:08:37.517Z","posted_by":{"actor":"webhook","channel":"webhook","ts":"2026-08-05T09:08:37.517Z"},"who_claims":"webhook","source_status":"sourced"},{"id":"c4","text":"Glenohumeral corticosteroid injection has randomised support in this condition, and practice varies widely between clinicians in dose, site and timing.","tier":"rct","source_ids":["s2","s4"],"why_material":"The evidence supports the injection while the survey shows the delivery is not standardised, so what a patient actually receives varies by who they see.","_id":"w_tzqvtz4h","_ts":"2026-08-05T09:08:37.793Z","posted_by":{"actor":"webhook","channel":"webhook","ts":"2026-08-05T09:08:37.793Z"},"who_claims":"webhook","source_status":"sourced"},{"id":"c5","text":"Platelet-rich plasma has been compared against corticosteroid injection in meta-analysis rather than assumed superior to it.","tier":"rct","source_ids":["s6"],"why_material":"PRP is marketed heavily for this condition, and the comparison against the cheap established option is the number that decides whether it is worth paying for.","_id":"w_0q9s1ifd","_ts":"2026-08-05T09:08:38.097Z","posted_by":{"actor":"webhook","channel":"webhook","ts":"2026-08-05T09:08:38.097Z"},"who_claims":"webhook","source_status":"sourced"},{"id":"c6","text":"Diabetes changes both the expected course and the treatment calculus in frozen shoulder, making it a different conversation rather than the same one with a caveat.","tier":"observational","source_ids":["s5"],"why_material":"A substantial share of frozen shoulder patients have diabetes, and a page that treats it as a footnote misinforms exactly the group most affected.","_id":"w_8z7s3f5g","_ts":"2026-08-05T09:08:38.446Z","posted_by":{"actor":"webhook","channel":"webhook","ts":"2026-08-05T09:08:38.446Z"},"who_claims":"webhook","source_status":"sourced"}],"sources":[{"id":"s1","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/42332346/","external_id":"42332346","pmid":"42332346","title":"Non-Surgical Management of People With Frozen Shoulder in the National Health Service: A Review of Publicly Available Patient Information Leaflets","quote":"No single PIL reflected all key elements recommended in the NICE Clinical Knowledge Summary and BESS best practice.","summary":"Musculoskeletal Care 2026: 38 NHS trusts' patient leaflets for frozen shoulder reviewed. They disagreed with each other on painkillers, activity, exercise and injections, and none matched national guidance in full.","author":"Winter A, Whelan G et al.","publisher":"Musculoskeletal care","date":"2026","tag":"Document review","accessed_at":"2026-08-05T01:26:56.404Z","prev":"genesis","hash":"2fefe0aa9d39fbba8912526033aa04e782fea1424216d6819c49195166ee5e74"},{"id":"s2","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/40139912/","external_id":"40139912","pmid":"40139912","title":"Corticosteroid Injections for Frozen Shoulder: A Global Online Survey of Health Professionals' Current Practice and Opinion","quote":"Respondents felt injections have an important role in the management of frozen shoulder (155/235, 66%) and the best time to inject is during the pain predominant phase (191/233; 82%).","summary":"Musculoskeletal Care 2025: a global survey of practitioners. Strong agreement on WHEN to inject, and enough variation in what is injected that the authors concluded many choices rest on personal preference or local guidance.","author":"Smith CB, Ryan V et al.","publisher":"Musculoskeletal care","date":"2025","tag":"Practitioner survey","accessed_at":"2026-08-05T01:26:56.404Z","prev":"2fefe0aa9d39fbba8912526033aa04e782fea1424216d6819c49195166ee5e74","hash":"31915e221ecacc51c7bb488cfa24155724004094b9168c70580660109bb19f03"},{"id":"s3","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/38692727/","external_id":"38692727","pmid":"38692727","title":"Anti-TNF (adalimumab) injection for the treatment of pain-predominant early-stage frozen shoulder: the Anti-Freaze-Feasibility randomised controlled trial","quote":"This was because many patients had passed the early stage of frozen shoulder or had already formulated a preference for treatment.","summary":"BMJ Open 2024: a feasibility trial of an anti-inflammatory injection in EARLY frozen shoulder could not recruit — by the time patients reached physiotherapy most were past the early stage or had already chosen a treatment.","author":"Hopewell S, Srikesavan C et al.","publisher":"BMJ open","date":"2024","tag":"Feasibility trial","accessed_at":"2026-08-05T01:26:56.404Z","prev":"31915e221ecacc51c7bb488cfa24155724004094b9168c70580660109bb19f03","hash":"20d00752b2e5a1c5155b61baae0686224c9043a65153acc91a21a76602dabfe9"},{"id":"s4","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/40495621/","external_id":"40495621","pmid":"40495621","title":"A Double Blind Randomised Controlled Trial Comparing Glenohumeral Cortisone With and Without Hydrodilatation in Patients With Frozen Shoulder","quote":"There were no significant differences between the groups at 8 weeks.","summary":"ANZ Journal of Surgery 2025: a double-blind randomised trial of cortisone alone versus cortisone plus fluid distension. Both improved on range of motion and every function score; adding distension changed nothing at 8 weeks.","author":"Konarski A, Narayanasamy K et al.","publisher":"ANZ journal of surgery","date":"2025","tag":"Randomised trial","accessed_at":"2026-08-05T01:26:56.404Z","prev":"20d00752b2e5a1c5155b61baae0686224c9043a65153acc91a21a76602dabfe9","hash":"040e47decfeaf41befb7d4b8c5d731a259c3d1dd0e013105027918600d9079ea"},{"id":"s5","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/41492617/","external_id":"41492617","pmid":"41492617","title":"Effectiveness of Hydrodilatation for Adhesive Capsulitis in Patients With Pre-existing Rotator Cuff Tears","quote":"However, rotator cuff integrity substantially influenced ROM recovery, with reduced gains in patients with partial- and full-thickness tears.","summary":"Cureus 2025: distension relieved pain in every subgroup, but the movement regained depended on the state of the rotator cuff. Diabetic patients gained less range, in a small subgroup the authors flag as uncertain.","author":"Prakash A, Selmi H et al.","publisher":"Cureus","date":"2025","tag":"Retrospective cohort","accessed_at":"2026-08-05T01:26:56.404Z","prev":"040e47decfeaf41befb7d4b8c5d731a259c3d1dd0e013105027918600d9079ea","hash":"726fe036eb3cca99749f4182c890dd7dfea689afdd1b6dd36c0e5bcce3c11077"},{"id":"s6","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/38022840/","external_id":"38022840","pmid":"38022840","title":"The efficacy of platelet-rich plasma injections compared to corticosteroids and physiotherapy in adhesive capsulitis: A systematic review and meta-analysis","quote":"PRP produces improved pain and functional scores as well as range of motion, which is statistically significant from 3 to 6 months post intervention.","summary":"Journal of Orthopaedics 2024: pooled analysis favouring platelet-rich plasma over corticosteroid and physiotherapy at 3 and 6 months — from small studies with varied preparation methods, against a comparator already known to fade.","author":"Pretorius J, Mirdad R et al.","publisher":"Journal of orthopaedics","date":"2024","tag":"Meta-analysis","accessed_at":"2026-08-05T01:26:56.404Z","prev":"726fe036eb3cca99749f4182c890dd7dfea689afdd1b6dd36c0e5bcce3c11077","hash":"95784967c36d592fab5e90ab45a4b45f9d7eee9db6707f7891de25d18a81af95"},{"id":"s7","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/40291049/","external_id":"40291049","pmid":"40291049","title":"British Elbow and Shoulder Society patient care pathway: Frozen shoulder","quote":"In the absence of high-quality trials, narrative reviews were created.","summary":"Shoulder & Elbow 2025: the British Elbow and Shoulder Society care pathway. 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