Frozen shoulder

Frozen shoulder peaks in women between 40 and 60, the perimenopausal window, and it's now one of the better-evidenced musculoskeletal effects of estrogen loss. Caught early, the course is much shorter. Caught at month nine, much longer. The first call matters.

Frozen shoulder moves through three overlapping phases over 12 to 30 months if left alone. Knowing which phase you're in changes what helps.

Estrogen receptors live in the shoulder capsule. The shoulder capsule is connective tissue rich in estrogen receptors. As estrogen drops, the capsule becomes more inflamed, more fibrotic and less elastic. This is the leading hypothesis for why adhesive capsulitis clusters so tightly around the perimenopausal window, and why MHT appears protective.

Phase 1. Freezing (2 to 9 months). Pain is the headline. A deep, aching pain at the front and outside of the shoulder, worse at night, worse when you reach. Range of motion starts to drop but you may not notice yet because the pain is louder. This is the window where intervention shortens the whole course most.

Phase 2. Frozen (4 to 12 months). Pain often eases, stiffness takes over. Specific motions become impossible: hand behind the back, reaching overhead, putting on a coat. This phase is where most people finally get a diagnosis, often after months of being told it's a rotator cuff issue.

Phase 3. Thawing (5 to 24 months). Range slowly returns. Most people regain most of their motion, but a meaningful minority are left with a residual deficit, especially without active treatment. 'It'll resolve on its own' is technically true and practically a long, painful sentence.

Diabetes and thyroid disease raise the risk further. Insulin resistance, type 2 diabetes and thyroid disease all increase the risk and severity of adhesive capsulitis, and all three are more common around perimenopause too. Worth checking your bloods if a frozen shoulder shows up out of nowhere.

There's no single fix, but a few interventions have moved the dial in real trials. The big lever is catching it early and keeping the joint moving without bullying it.

Get a diagnosis on the calendar this month, not next. A musculoskeletal physiotherapist or a shoulder-trained doctor can usually diagnose it from the pattern alone (loss of external rotation is the classic finding). Earlier intervention shortens the course substantially. Don't wait for it to 'settle.'

A physiotherapist who treats frozen shoulder weekly, not monthly. Generic 'rotator cuff' rehab isn't the same protocol. You want someone who knows the capsular pattern and can grade the loading carefully through the freezing and frozen phases. Manual therapy plus a home program has the best evidence.

Hydrodilatation or intra-articular steroid injection. An injection of saline (sometimes with steroid) into the joint capsule under ultrasound, hydrodilatation, has good evidence for shortening the painful freezing phase and improving range. Useful when pain is the rate-limiter on doing the rehab. Ask specifically; many GPs don't think to offer it.

Have the MHT conversation, specifically about this shoulder. The 2022 Menopause-journal data on MHT and adhesive capsulitis is the strongest hormonal signal yet in midlife musculoskeletal care. If you're already a candidate for MHT, mention this shoulder by name. Many menopause-trained doctors will weigh it in the decision.

Daily gentle range-of-motion at home. Pendulum swings, wall-walks, towel stretches, doorway hangs, five to ten minutes, two to three times a day. Pain at the end of range is acceptable; pain that lasts hours afterwards is too much. Consistency beats intensity.

Sleep posture and pain management for the freezing phase. Side-sleeping on the affected shoulder is the loudest pain trigger. A pillow tucked under the elbow when on your back, or hugging a pillow on the unaffected side, helps most people. Topical NSAIDs (diclofenac gel) at night have lower systemic load than tablets.

Surgery is rare, and a last resort. Manipulation under anaesthesia or arthroscopic capsular release exists for stubborn cases that haven't responded to a year of good rehab and injection. Recovery is intense. Most people never need it.