In short
Frozen shoulder isn't a torn muscle or a pinched nerve — it's the shoulder capsule itself tightening. That distinction changes how it's treated, and how long it realistically takes to resolve.
Frozen shoulder, medically called adhesive capsulitis, is one of the more frustrating conditions in orthopedics — not because it's dangerous, but because it's slow, painful, and often misunderstood. Unlike a rotator cuff tear or a dislocation, there is usually no single injury to point to. The capsule surrounding the shoulder joint itself thickens and tightens, and movement becomes progressively more restricted.
Who gets frozen shoulder, and why
Frozen shoulder is more common between the ages of 40 and 60, and somewhat more common in women. It occurs more frequently in people with diabetes and thyroid disorders, and often follows a period where the shoulder was used less than usual — after a stroke, a fracture in the same arm, or even a long stretch of avoiding movement because of unrelated pain.
In many cases, though, there is no clear trigger at all. This unpredictability is part of what makes the condition hard for patients to make sense of — it can feel like it came from nowhere.
The three stages
Frozen shoulder typically moves through three overlapping phases, and understanding which one you're in helps set realistic expectations:
- Freezing stage — pain gradually worsens, and movement becomes more limited as the pain increases. This phase can last a few months.
- Frozen stage — pain often eases somewhat, but stiffness is at its worst. Reaching overhead, behind the back, or out to the side becomes genuinely difficult.
- Thawing stage — movement gradually returns, sometimes slowly over many months.
What actually helps
Treatment is aimed at controlling pain early and preserving as much movement as possible through the stiff phase, rather than forcing the shoulder to move before it's ready.
- Physiotherapy — a structured, gradual stretching programme is the backbone of treatment, adjusted to which stage you're in
- Anti-inflammatory medication — to manage pain, particularly in the freezing stage
- Steroid injections — can meaningfully reduce pain and, in some patients, shorten the stiff phase, particularly when given earlier in the course
- Activity modification — avoiding aggressive stretching that provokes pain, without avoiding gentle movement altogether
When it doesn't respond to non-surgical treatment
A small number of patients still have significant stiffness after several months of consistent physiotherapy and injections. In that situation, options include manipulation under anaesthesia (gently moving the shoulder through its range while the patient is asleep) or arthroscopic capsular release, a keyhole procedure that releases the tightened capsule. Both are considered only after non-surgical treatment has had a genuine trial.
If shoulder stiffness has been building for weeks without a clear injury, it's worth having it assessed early — starting physiotherapy in the freezing stage, rather than waiting until movement is already badly limited, tends to make the rest of the process more manageable.
See our full Orthopedics department — conditions we treat and howFrequently asked questions
How long does frozen shoulder last?+
The full course, from first stiffness to complete resolution, commonly runs anywhere from several months to two or three years if left untreated. Treatment doesn't guarantee a faster timeline in every case, but it usually keeps pain more manageable and can shorten the stiff phase.
Does frozen shoulder need surgery?+
Most cases resolve with physiotherapy, pain management, and sometimes a steroid injection, without ever needing surgery. Surgery or a manipulation procedure is reserved for the minority of cases that plateau at significant stiffness despite months of proper non-surgical treatment.
Why do I have frozen shoulder if I didn't injure my shoulder?+
That's the defining feature of frozen shoulder — it usually isn't caused by a specific injury. It's more common after a period of reduced shoulder movement (such as recovering from another injury or surgery), and in people with diabetes or thyroid conditions, though it can also occur for no identifiable reason.
This article is general health information, not medical advice, and it cannot account for your individual circumstances. Please consult a qualified orthopedic specialist about your own symptoms before making treatment decisions.
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