frozen shoulder: how physio treatment helps | ck physio

Frozen shoulder — medically called adhesive capsulitis — is an inflammatory and fibrotic contracture of the shoulder joint capsule that causes deep pain and progressive loss of movement, classically through three phases: freezing, frozen and thawing. It affects 2–5% of the UK adult population and 10–20% of people with diabetes; left untreated it lasts a mean of 15 months and around 40% have ongoing symptoms at three years. Early phase-appropriate treatment with steroid injection, hydrodilatation and structured physiotherapy substantially shortens the course and reduces long-term restriction. This guide explains how frozen shoulder is diagnosed, what each treatment actually does, the exercises that work in each phase, when to escalate to specialist procedures, and how CK Physio treats frozen shoulder across Hanwell, Ealing and West London.

What is frozen shoulder, exactly?

Frozen shoulder is an inflammatory and fibrotic contracture of the glenohumeral joint capsule — the soft-tissue envelope around the shoulder ball-and-socket joint — that thickens, scars and shrinks until it physically restricts how far the shoulder can move. The most affected structures are the coracohumeral ligament and the rotator interval, which become 50–80% thicker than normal. This isn't a muscle problem, a tendon tear, or arthritis — it's the joint's lining that's literally constricting around the joint.

Inside the joint, two things are happening at once. First, an inflammatory cascade dominated by TNF-alpha and interleukin-6 produces severe deep pain — especially at night. Second, growth factors (particularly TGF-beta) drive fibroblasts to lay down disorganised collagen, thickening the capsule and reducing the joint's volume. Over months, the inflammation gradually settles but the contracture remains, which is why frozen shoulder hurts the most early on but becomes most stiff later.

Frozen shoulder is divided into primary (no obvious trigger; usually middle-aged adults, often associated with diabetes or thyroid disease) and secondary (following shoulder trauma, surgery, prolonged immobilisation, or after stroke or breast cancer treatment). The clinical course is similar; the treatment pathway differs slightly because secondary frozen shoulders may have other concurrent injuries that need addressing.

The three phases of frozen shoulder — and why they matter

Frozen shoulder classically progresses through three overlapping phases — freezing (painful, 2–9 months), frozen (stiff, 4–12 months), and thawing (recovering, 12–24 months) — and the right treatment is different in each. Knowing which phase you're in is the single most important thing for choosing the right intervention.

The traditional view that frozen shoulder is uniformly self-limiting and resolves completely on its own has been challenged. Recent evidence shows that approximately 40% of patients have ongoing symptoms at three years, and around 11% develop permanent significant functional limitation. “Watchful waiting” is no longer the recommended default — early diagnosis and phase-appropriate treatment substantially reduce symptom duration, severity and risk of permanent restriction.

How frozen shoulder is diagnosed (and what tests you don't usually need)

Pendulum exercises are the safest way to maintain shoulder mobility in the painful freezing phase.

Frozen shoulder is a clinical diagnosis — the cardinal finding is loss of passive external rotation in the “capsular pattern” (external rotation worst, abduction next, internal rotation least), in the absence of bony or rotator-cuff explanations. Most people don't need an MRI.

A typical CK Physio frozen-shoulder assessment includes:

1. History: Onset (insidious vs after trauma), pain pattern, sleep disruption, diabetes/thyroid history, occupation, previous shoulder problems.
2. Active and passive range of motion: Both should be restricted in the same pattern. If passive is much greater than active, suspect rotator cuff pathology instead.
3. Capsular pattern check: External rotation loss >50% of the unaffected side, plus restriction in at least two other planes by >25%.
4. Strength testing: Usually preserved (frozen shoulder is a stiffness problem, not a weakness problem).
5. Special tests: Coracoid pain test, screening for rotator cuff and AC joint contributions.
6. Plain X-ray: To exclude osteoarthritis, calcific tendinopathy or other bony causes. Recommended for most cases.
7. MRI: Not routinely needed. Reserved for atypical presentations, suspected rotator cuff tear, or when surgical opinion is being sought.

Ultrasound is increasingly used in clinic settings — an axillary recess capsule thickness over 2.0 mm has 100% sensitivity and 96% specificity for adhesive capsulitis. It's also useful for excluding alongside problems like calcific tendinopathy or partial cuff tears.

Who gets frozen shoulder? Key risk factors

Frozen shoulder disproportionately affects women aged 45–60, people with type 2 diabetes (5× baseline risk), people with thyroid disease (2.7× risk), and anyone whose shoulder has been immobilised after surgery or fracture. Specific risk factors with strong evidence:

• Diabetes mellitus: Prevalence rises from 2.3% (general population) to 10–20% in diabetics. The relationship is dose-dependent — longer duration and worse glycaemic control predict higher risk and more refractory disease.
• Thyroid disease: 2.69× relative risk, particularly with hypothyroidism and benign thyroid nodules.
• Prior shoulder immobilisation (after rotator cuff surgery, fracture, breast surgery, stroke).
• Female sex: 10.1% prevalence in women vs 8.2% in men.
• Dupuytren's disease (8.27× more common in adhesive-capsulitis patients) — both are fibroproliferative conditions and likely share a genetic predisposition.
• Hyperlipidaemia, low BMI, cervical spondylosis — all independent risk factors in multivariate analysis.
• Parkinson's disease, prior cardiac or neurosurgery, breast cancer treatment (especially mastectomy with reconstruction).

If you have one shoulder affected, there's a 5–17% risk of the other side following within 5 years — one good reason to keep up gentle preventive movement on the unaffected side too.

What's the best treatment for frozen shoulder? The evidence hierarchy

Image-guided steroid injection in the freezing phase delivers strong short-term pain relief — combined with physio for durable benefit.

The strongest evidence supports a phase-matched, combined approach: image-guided steroid injection in the freezing phase plus structured physiotherapy; hydrodilatation in the frozen phase if movement remains badly restricted; progressive strengthening in the thawing phase. Surgery is reserved for refractory cases that fail 6–12 months of structured conservative care.

Intra-articular corticosteroid injection

Cochrane evidence shows short-term benefit (relative risk 1.66 vs comparator at 7 weeks). Best deployed in the early freezing phase when inflammation drives pain. The benefit is largely time-limited (~6 weeks) when used alone — combined with physiotherapy, the gains are durable. British Elbow and Shoulder Society 2024 guidance recommends it as part of the standard non-operative pathway in primary and secondary care.

Hydrodilatation (capsular distension)

Saline plus corticosteroid is injected under image guidance into the joint capsule, mechanically stretching the contracted tissue. Meta-analysis evidence shows hydrodilatation outperforms steroid injection alone for passive external rotation — the most restricted motion in frozen shoulder — with effects sustained at late follow-up (SMD 0.68, 95% CI 0.21–1.16). BESS 2024 conditionally recommends hydrodilatation in the frozen phase. Particularly useful when steroid injection alone has plateaued and stiffness remains profound.

Suprascapular nerve block

An injection of local anaesthetic around the suprascapular nerve. As an adjunct to physiotherapy, it cuts mean symptom duration from 11.2 to 5.4 months — a near-halving. Underused in standard NHS pathways but offered in some specialist clinics; particularly helpful for severe pain that prevents engagement with rehabilitation.

Physiotherapy

Manual therapy (especially Mulligan mobilisation-with-movement of the glenohumeral joint), end-range stretches, scapular work, postural correction and graded loading. Physiotherapy as a standalone intervention is slower than combined approaches but it's what carries the joint through the long arc of recovery and prevents recurrence. Without it, the gains from injection or hydrodilatation aren't fully consolidated.

Manipulation under anaesthesia (MUA)

The patient is anaesthetised and the surgeon physically forces the shoulder through full range, breaking the capsular adhesions. Reserved for cases that have failed 6–12 months of conservative management. The 2024 UK FROST trial found MUA to be the most cost-effective surgical option (£20,000/QALY threshold, 86% probability of cost-effectiveness vs other surgical options) with comparable long-term outcomes to arthroscopic release.

Arthroscopic capsular release

Keyhole surgery to cut the contracted parts of the capsule. Reserved for the most refractory cases or those needing concurrent surgery (e.g. on the rotator cuff). Comparable long-term function to MUA but more invasive and longer recovery.

NSAIDs and pain relief

Short courses of NSAIDs (where not contraindicated) help with pain in the freezing phase. They don't change the underlying disease. Opioids should be avoided as they don't help structural problems and create their own issues.

Best exercises for frozen shoulder by phase

The right exercise for frozen shoulder depends on the phase — in freezing, the goal is to maintain mobility without provoking the inflamed capsule; in frozen, the goal is to push end-range and recover lost motion; in thawing, the goal is to restore strength. Doing the wrong exercises (aggressive end-range stretching in the freezing phase) will flare the inflammation and lengthen the course.

Freezing phase exercises (weeks 0–9)

1. Codman pendulum (daily): Lean forward supported by your good arm on a table; let the affected arm hang and gently swing in small circles, side-to-side, and forward-back. 1–2 minutes, 3× daily. Painless gravity-assisted motion.
2. Pain-free active ROM: Move the shoulder within the range that doesn't trigger sharp pain. Don't force end-range.
3. Posture work: Scapular setting in sitting, postural correction. Keeps the rest of the upper back working while the joint settles.
4. Sleep positioning: Pillow between body and arm, lying on the unaffected side, can substantially improve sleep.

Frozen phase exercises (weeks 9–48)

Wand-assisted external rotation stretches recover the most restricted plane of motion in the frozen phase.

1. Wand external rotation stretch: Lying on your back, hold a long wooden dowel with both hands, elbows tucked at your sides. Use the unaffected hand to push the wand outward, rotating the affected arm into external rotation. Hold 30 seconds. 3 reps, 3× daily.
2. Wall walks: Stand facing a wall, “walk” the affected hand up the wall using the fingers. Mark the highest point with a piece of tape; aim to beat it weekly.
3. Cross-body stretch: Use the unaffected arm to gently pull the affected arm across the chest. Stretches the posterior capsule. Hold 30 seconds, 3 reps.
4. Sleeper stretch: Lying on the affected side with the arm at 90°, gently push the forearm down toward the bed for an internal rotation stretch. Hold 30 seconds, 3 reps.
5. Door-frame external rotation: Stand in a doorway with elbow at side, hand on the frame; rotate body away to push affected arm into external rotation. Hold 30 seconds, 3 reps.

Thawing phase exercises (12 months+)

1. Resistance-band external/internal rotation: Light resistance, 15 reps, 3 sets, 3×/week.
2. Scapular strengthening: Y-T-I prone exercises, scapular retraction, push-up plus.
3. Functional reaching tasks: Reaching to top shelves, behind back, behind head with light loads.
4. Progressive loading: Add dumbbell or kettlebell work as tolerated; this rebuilds the capacity that disuse has eroded.

One general rule: a stretch that reproduces familiar shoulder pain at a 3–5/10 intensity and settles within 2 hours is doing useful work. Sharp pain spiking to 7+/10 or pain that lingers to the next day means you've over-pushed — back off and move into the next-best position.

How long does frozen shoulder take to recover?

Untreated, frozen shoulder lasts a mean of 15 months (range 4–36 months); with appropriate phase-matched treatment, this typically shortens to 6–12 months and the residual restriction is much less. Treatment doesn't make the body stop the underlying biology — it shortens each phase, reduces peak pain, and improves the end ROM. Here's a realistic timeline at CK Physio:

Some patients recover fully; others retain some residual loss of external rotation that doesn't bother them functionally. The aim is not always perfect symmetry — it's getting back to lifting your arm to wash your hair, reach a shelf, and sleep through the night without pain.

Differential diagnosis: it might not be frozen shoulder

Shoulder pain plus stiffness has several possible causes — rotator cuff pathology, glenohumeral osteoarthritis, calcific tendinopathy, post-traumatic stiffness, cervical referral — and getting the diagnosis right matters because the treatments differ.

Common conditions that mimic frozen shoulder:

• Rotator cuff pathology — usually preserved passive motion with active loss; pain on resisted testing.
• Glenohumeral osteoarthritis — X-ray distinguishes; capsular pattern can look similar but bony crepitus and joint-line tenderness suggest OA.
• Calcific tendinopathy — acute severe pain with calcium deposit on imaging; can occasionally co-exist with frozen shoulder.
• Cervical radiculopathy (C5-C6) — covered in our complete guide to trapped nerves in the neck and shoulders; dermatomal pain pattern + neck-related provocation.
• Glenohumeral instability — usually younger patients, history of dislocation or apprehension on testing.

When should you see a physiotherapist about frozen shoulder?

The earlier the better — ideally within the first 2–3 months of symptoms onset, while you're still in the freezing phase and the capsule hasn't fully contracted. Specifically, see a physiotherapist (or your GP for onward referral) if you have any of these:

• Persistent shoulder pain for >2 weeks not improving with rest and over-the-counter analgesia
• Pain that wakes you at night or stops you sleeping on the affected side
• Difficulty reaching behind your back (e.g. fastening a bra, getting a wallet from a back pocket)
• Difficulty lifting the arm overhead (e.g. brushing hair, reaching a top shelf)
• Diabetes plus new shoulder symptoms — you're at substantially elevated risk
• Any shoulder problem after a recent shoulder surgery, fracture or stroke that hasn't recovered as expected

Don't wait for the “6-month frozen phase” before seeking treatment. Patients diagnosed in stage 1 (freezing) achieve better short-term results, faster recovery of full mobility, and need fewer interventions than those who present in stage 2.

How CK Physio treats frozen shoulder in West London

Posterior capsule stretches like the cross-body reach are essential for restoring internal rotation in the frozen and thawing phases.

CK Physio offers a complete frozen-shoulder pathway across Hanwell, Ealing and West London — chartered physiotherapy, manual therapy, structured exercise progression, and onward referral for image-guided injection or hydrodilatation when indicated. 22 years, BUPA and AXA PPP-approved, HCPC-registered.

A typical CK Physio frozen-shoulder pathway:

1. Initial 60-minute assessment: Full history, ROM testing, capsular pattern check, exclusion of differentials, X-ray request if not done, clear diagnosis and phase identification, treatment plan.
2. Freezing phase (months 0–3): Pain control, gentle ROM, Codman pendulum, sleep advice. Onward referral to GP or musculoskeletal consultant for image-guided steroid injection. 4–6 sessions over 8–12 weeks.
3. Frozen phase (months 3–6): Manual therapy (Mulligan MWM), end-range stretching, wand work, posterior capsule stretches. Onward referral for hydrodilatation if indicated. 6–8 sessions over 12 weeks.
4. Thawing phase (months 6–12): Progressive strengthening, return-to-function loading, capsular maintenance. 4–6 sessions over 12 weeks.
5. Refractory cases: Specialist referral for MUA or arthroscopic release if <70% function recovered by 9–12 months.

Standard frozen-shoulder physiotherapy session pricing in private West London is £65–£95 per session (initial assessments £75–£110); a typical 14-session course over 9–12 months totals £910–£1,330. We're registered with BUPA and AXA PPP for insured patients. Home visits are available across Hanwell, Ealing and surrounding West London — particularly useful for the painful freezing phase when sleep disruption and arm restriction make travel difficult.

Frequently asked questions

How long does frozen shoulder last?

Untreated, mean duration is around 15 months (range 4–36 months). With phase-matched treatment combining steroid injection, hydrodilatation where needed, and structured physiotherapy, most patients see substantial improvement by 6–9 months and resolution by 12. Around 40% of untreated patients still have symptoms at 3 years; treatment substantially reduces this. The single biggest predictor of faster recovery is starting treatment in the freezing phase rather than waiting for the frozen phase.

Is frozen shoulder the same as a rotator cuff tear?

No. Frozen shoulder is a capsular contracture (the joint lining shrinks); a rotator cuff tear is damage to one of the four tendons that move and stabilise the shoulder. The clinical pictures are different too — in frozen shoulder, both active and passive movement are restricted in a capsular pattern with relatively preserved strength. In a rotator cuff tear, passive motion is usually preserved but active motion and strength are lost. They can co-exist, and a careful clinical assessment (sometimes with ultrasound or MRI) is needed to distinguish them.

Should I rest a frozen shoulder?

No. Rest worsens frozen shoulder by allowing the capsule to contract further. The right approach is pain-managed movement: gentle pendulum and pain-free ROM in the freezing phase; progressive end-range stretches in the frozen phase; loaded strengthening in the thawing phase. The principle is “motion is lotion” — even small ranges of regular movement keep the joint from locking down further.

Will my frozen shoulder get better on its own?

Often, yes — but slowly, and not always completely. Around 60% of untreated patients fully recover within 3 years; around 40% have ongoing symptoms; 11% have permanent significant restriction. Treatment substantially shortens duration and reduces residual restriction. “Wait and see” isn't recommended any more, because the difference between a 6-month treated course and a 24-month untreated course is large.

Can frozen shoulder come back?

The same shoulder rarely refreezes once it has fully thawed (recurrence in the same shoulder is uncommon). However, the other shoulder develops frozen shoulder in 5–17% of cases within 5 years. This is one good reason to keep both shoulders moving with regular general exercise (swimming, gym, racket sport) once you've recovered.

Does diabetes make frozen shoulder worse?

Yes. People with type 2 diabetes have a 5× baseline risk of developing frozen shoulder, and tend to have a longer, more refractory course. Tight glycaemic control supports recovery. Diabetic patients often benefit from adding hydrodilatation earlier in the pathway, and may need more sessions of physiotherapy. Steroid injection works but can transiently raise blood sugar, so co-ordinate with your GP or diabetes specialist.

Should I have surgery for frozen shoulder?

Surgery (manipulation under anaesthesia or arthroscopic capsular release) is reserved for the ~10% of patients who haven't substantially recovered after 6–12 months of structured conservative treatment including injection and physiotherapy. The 2024 UK FROST trial found MUA to be the most cost-effective surgical option, with comparable long-term outcomes to arthroscopic release. Both produce good results, but neither is risk-free — conservative care first, surgery only when it's earned.

Sources & further reading: British Elbow and Shoulder Society (BESS) Guideline on Frozen Shoulder 2024; UK FROST Trial 2024 (manipulation under anaesthesia vs arthroscopic release); Cochrane Database of Systematic Reviews on corticosteroid injection for shoulder pain (2024); Buchbinder et al. on hydrodilatation for adhesive capsulitis; NICE Clinical Knowledge Summary — Shoulder Pain; Chartered Society of Physiotherapy; Health and Care Professions Council. knee osteoarthritis physiotherapy treatment guide