Frozen Shoulder

A different kind of shoulder problem

Most shoulder pain is a tissue problem — a tendon, a bursa, a joint surface. Frozen shoulder is different. In adhesive capsulitis, the capsule that surrounds the shoulder joint becomes inflamed, then thickens and contracts, physically shrinking the space the joint has to move in. The shoulder doesn't just hurt; it progressively loses range, in every direction, no matter who is moving it.

That last detail is the diagnostic key. If I move your arm for you — no muscles involved, no guarding — and it still stops early, especially in external rotation, that is a capsule problem. Rotator cuff problems hurt, but the passive range is usually there.

Frozen shoulder affects roughly 2 to 5 percent of people at some point, most often between ages 40 and 65, and women more than men. Diabetes is the biggest risk factor — people with diabetes get it more often, more severely, and more stubbornly. Thyroid disease raises risk too. It can start after a minor injury or a period of immobilization (a sling, a surgery, even a few weeks of guarding a sore shoulder), or with no trigger at all.

The three phases

Frozen shoulder follows a course that is unusually predictable, and knowing which phase you are in changes what treatment makes sense.

Freezing (roughly 2 to 9 months). Pain dominates. It is often severe, worse at night, and present at rest. Range of motion is quietly disappearing underneath the pain. This phase is frequently misdiagnosed as a rotator cuff problem, because early on, it looks like one.

Frozen (roughly 4 to 12 months). The pain eases, but the stiffness is fully installed. Reaching overhead, behind your back, into a jacket sleeve — blocked. Sleep improves; function does not.

Thawing (roughly 6 to 24 months). Range gradually returns. Most people recover most of their motion, though full recovery can take one to three years from the start, and a minority are left with some permanent restriction — more commonly in diabetics.

The natural history is mostly favorable, which is genuinely reassuring. The job of treatment is to shorten the arc, control the pain, and protect the rest of the body from a year of compensation.

What wastes your time

Aggressive stretching during the freezing phase. Forcing a hot, inflamed capsule makes pain worse and may prolong the inflammatory phase. This is the most common mistake, and it is usually made out of diligence — the patient trying hardest gets worse fastest.

Waiting for an MRI to tell you what you have. Frozen shoulder is a clinical diagnosis made on exam. Imaging is useful to rule out other problems when the story is atypical, but a normal MRI does not rule frozen shoulder in or out, and waiting weeks for one delays the treatment that matters most in the early phase.

Ignoring it because "it will resolve on its own." Eventually, probably. But eighteen months of a shoulder you can't use has real costs — sleep, work, the neck and upper back that take over its job.

How we approach it

Get the diagnosis right, early. The exam separates capsulitis from cuff pathology, and in-office ultrasound lets us rule out the mimics in the same visit.

Calm the capsule in the freezing phase. This is the one context where a corticosteroid injection has strong, well-supported evidence: an injection into the glenohumeral joint early in the course reduces pain and speeds recovery of motion. Timing matters — steroid helps most in the inflammatory phase and does little once the shoulder is simply stiff. Doing it under ultrasound guidance matters too, because blind shoulder injections miss the joint a meaningful fraction of the time.

Treat what the shoulder is attached to. A frozen shoulder drags the shoulder blade, ribs, thoracic spine, and neck into compensation. Osteopathic treatment of those regions doesn't unfreeze the capsule, but it keeps the rest of the quarter functional and often takes real pressure off the pain — especially the neck and upper back ache that comes from hiking the shoulder for months.

Match the rehab to the phase. Freezing: gentle motion within tolerance, pain control, sleep protection. Frozen and thawing: progressively assertive capsular stretching and restoring strength through the returning range. The same exercise program that harms in month two helps in month ten.

Escalation for the outliers. For shoulders that stay severely restricted deep into the course, options include hydrodilatation (distending the capsule with fluid under guidance) and, rarely, manipulation under anesthesia or arthroscopic capsular release. Most people never need these.

If you have diabetes

Your risk is several-fold higher, both shoulders can be affected over time, and the course tends to run longer. Glycemic control genuinely matters here — this is one of the musculoskeletal conditions where metabolic health and joint health are visibly the same conversation. It is also a reason not to shrug off a stiffening shoulder for months before getting it examined.

When to come in

Come in if your shoulder is losing motion — not just hurting, but blocking movements it used to allow — or if night pain is waking you regularly. The freezing phase is the window where treatment changes the trajectory most, and it is exactly the phase most people spend waiting for it to go away on its own.