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Per-claim provenance."}],"not_medical_advice":true},"slug":"frozen-shoulder","title":"Frozen shoulder: the movement that identifies it, the two phases, and what actually helps in each","register":"accessible","tags":[],"updated_at":"2026-08-05T09:08:38.446Z","body_excerpt":"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, stronges","ranking":"safety-first (interaction_risk/limitations), then quote-gated effective_weight","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","interaction_risk":false,"status":"active","source_ids":["s1","s7"],"source_status":"sourced","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.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.1,"quote_gated":false},{"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","interaction_risk":false,"status":"active","source_ids":["s7"],"source_status":"sourced","why_material":"Applying a late-phase treatment early, or the reverse, is the most common way care goes wrong in this condition.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.1,"quote_gated":false},{"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","interaction_risk":false,"status":"active","source_ids":["s3"],"source_status":"sourced","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.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.1,"quote_gated":false},{"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","interaction_risk":false,"status":"active","source_ids":["s2","s4"],"source_status":"sourced","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.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.1,"quote_gated":false},{"id":"c5","text":"Platelet-rich plasma has been compared against corticosteroid injection in meta-analysis rather than assumed superior to it.","tier":"rct","interaction_risk":false,"status":"active","source_ids":["s6"],"source_status":"sourced","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.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.1,"quote_gated":false},{"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","interaction_risk":false,"status":"active","source_ids":["s5"],"source_status":"sourced","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.","retracted_at":null,"retraction_reason":null,"challenged_by":[],"effective_weight":0.1,"quote_gated":false}],"sources":[{"id":"s1","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/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.","claim_ids":[],"hash":"2fefe0aa9d39fbba8912526033aa04e782fea1424216d6819c49195166ee5e74"},{"id":"s2","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/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.","claim_ids":[],"hash":"31915e221ecacc51c7bb488cfa24155724004094b9168c70580660109bb19f03"},{"id":"s3","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/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.","claim_ids":[],"hash":"20d00752b2e5a1c5155b61baae0686224c9043a65153acc91a21a76602dabfe9"},{"id":"s4","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/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.","claim_ids":[],"hash":"040e47decfeaf41befb7d4b8c5d731a259c3d1dd0e013105027918600d9079ea"},{"id":"s5","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/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. 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Searched to March 2023 and graded with GRADE, and states where the trial evidence ran out and convention took over.","claim_ids":[],"hash":"3f878b91da1793177a37a999d725f0f8e3422aaac13dfdeafcce9a0bac09cf21"}],"anecdotal_sources":[],"scientific_sources":[{"id":"s1","type":"pubmed","url":"https://pubmed.ncbi.nlm.nih.gov/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. 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