In short
Frozen shoulder is a self-limiting but slow condition in which the shoulder capsule becomes inflamed and then contracts. It passes through three stages, and the single most useful thing to know is that what helps in the later stages makes the earlier ones worse.
Reviewed by Dr. Ashish Baweja, DM Clinical Immunology & Rheumatology, AIIMS Rishikesh · last updated October 2026
Frozen shoulder — adhesive capsulitis — is one of the few conditions where the treatment changes completely depending on when you catch it. People who are given a sheet of stretches in the first painful month often end up worse, and conclude that physiotherapy does not work. The physiotherapy was right; the timing was wrong.
What is actually happening
The shoulder joint sits inside a capsule of connective tissue. In frozen shoulder that capsule becomes inflamed, thickens, and then contracts, so the joint physically has less room to move.
The distinguishing feature is loss of movement in every direction, including when somebody else moves your arm for you. That last part is what separates it from a rotator cuff problem, where you may be unable to lift the arm yourself but it can be lifted passively. Reaching behind your back to fasten a garment, or reaching across to the opposite shoulder, is usually the first thing to go.
Stage one: freezing
Roughly two to nine months. Pain dominates. It is worse at night, often badly enough to prevent sleeping on that side, and it hurts at rest rather than only on movement. Range of movement is starting to fall but pain is the main complaint.
What helps here:
- Pain control that lets you sleep. This is the priority, not range of movement.
- A steroid injection into the joint. In the painful stage this is the single most effective intervention for many people, and it often shortens the painful phase. It is most useful early.
- Gentle movement within the comfortable range — pendulum swings, not stretching.
- Keeping the arm in use for ordinary tasks as far as comfort allows.
What makes it worse: aggressive stretching, forced manipulation, and heavy weights. Pushing hard into pain during the inflammatory phase increases pain and can lengthen the whole course.
Stage two: frozen
Roughly four to twelve months. The pain settles substantially. What remains is stiffness, and it can be severe — reaching a high shelf, fastening a bra, getting a wallet from a back pocket, or combing hair may all be impossible.
This is where stretching earns its place. The capsule is tight rather than acutely inflamed, and sustained, repeated stretching now genuinely helps:
- External rotation stretch. Elbow at the side and bent to ninety degrees, use a stick or the other hand to rotate the forearm outwards. Hold for 30 seconds.
- Wall walking. Fingers walk up a wall in front and to the side, a little further each day.
- Cross-body stretch. Draw the affected arm across the chest with the other hand.
- Towel stretch behind the back, pulling gently upward with the good arm.
Two or three sessions a day, a few repetitions each, held for 20–30 seconds, taken to the point of stretch and mild discomfort — not to sharp pain. Progress is measured in weeks.
Stage three: thawing
Roughly five to twenty-four months. Movement gradually returns. Continued stretching plus strengthening restores function. Most people recover useful movement, though a proportion are left with some permanent restriction, particularly external rotation.
The whole course commonly runs one to three years. That is a long time, and being told it will get better on its own is small comfort in month four — which is why the active treatments in the first two stages matter.
Why diabetes keeps coming up
Frozen shoulder is substantially commoner in people with diabetes, tends to be more severe, lasts longer, and is more likely to affect both shoulders in turn. This is well established and it is the reason a rheumatologist seeing a frozen shoulder will usually check a blood sugar or HbA1c if it has not been checked recently.
It is also commoner with thyroid disease — another reason thyroid function gets tested, and a link covered in thyroid trouble and aching joints — and after a period of immobilisation, such as a fracture, a stroke, or shoulder surgery.
If you have a frozen shoulder and have never had your blood sugar checked, that is worth doing.
When it is not frozen shoulder
The label gets applied to almost any painful, stiff shoulder. Several other things look similar and need different treatment:
- Rotator cuff tear or tendinopathy — painful arc on lifting, weakness, but passive movement is preserved.
- Shoulder osteoarthritis — grinding, usually older patients, changes on X-ray.
- Calcific tendinitis — sudden severe pain, visible calcium on X-ray.
- Inflammatory arthritis — shoulder stiffness alongside other joints, long morning stiffness, raised markers. Polymyalgia rheumatica in particular causes shoulder and hip girdle stiffness in people over fifty and responds dramatically to low-dose steroids.
- Referred pain from the neck — see cervical spondylosis.
A shoulder that is stiff in every direction, including when moved by someone else, is the one that is genuinely frozen.
Treatments beyond exercise
Steroid injection — most useful in the painful stage; ultrasound guidance improves accuracy.
Hydrodilatation — injecting fluid under pressure to stretch the capsule, done radiologically. Useful in stubborn cases.
Manipulation under anaesthesia or arthroscopic release — reserved for shoulders that remain severely restricted after a long period of proper conservative treatment, and not a first move.
Anti-inflammatory tablets help the pain but do not change the course. Neither does prolonged rest in a sling, which risks making the stiffness worse.
Sleeping with a painful shoulder
Night pain is what exhausts people in the first stage, and a few arrangements genuinely help.
- Sleep on the unaffected side, hugging a pillow in front of you so the painful arm rests on it rather than hanging forward or being dragged across the body.
- On your back, place a thin pillow or folded towel under the upper arm so the shoulder is not pulled backwards by gravity.
- Avoid lying on the affected side, which compresses the joint for hours.
- A warm shower before bed loosens the shoulder enough to get to sleep.
- Take any prescribed pain relief before bed rather than waiting to be woken by pain.
Sleep deprivation makes pain worse the following day, so protecting it is treatment rather than comfort. If night pain is unmanageable despite these measures, that is a reason to ask about an injection rather than to endure another month.
What to do now
Work out which stage you are in, because it determines everything:
- Mostly pain, especially at night, movement starting to go — stage one. Prioritise pain relief and consider an injection. Do not stretch hard.
- Pain much better, movement badly restricted — stage two. Stretch, daily, with patience.
- Movement slowly returning — stage three. Keep stretching and add strengthening.
And get the shoulder examined rather than assuming, because the treatment for a rotator cuff tear is not the treatment for a frozen capsule. If you would like it assessed, you can request a callback or book a consultation.
Common questions
Which exercise is best for a frozen shoulder?
It depends on the stage. In the painful first stage, gentle pendulum swings within comfort — aggressive stretching makes it worse. In the stiff second stage, sustained stretches held for 20 to 30 seconds: external rotation with a stick, wall walking, cross-body stretch and a towel stretch behind the back, two or three times a day.
How long does frozen shoulder last?
Commonly one to three years in total, through freezing, frozen and thawing stages. Treatment does not abolish the course, but a steroid injection in the painful stage and consistent stretching in the stiff stage shorten it meaningfully and make it far more bearable.
What exercises should be avoided with a frozen shoulder?
In the early painful stage, forced stretching, heavy weights, overhead pressing and anything taken into sharp pain. Pushing hard while the capsule is actively inflamed increases pain and can prolong the condition. Stretching becomes the right treatment once the pain phase has settled.
Why is frozen shoulder linked to diabetes?
It is substantially commoner in people with diabetes, tends to be more severe and longer-lasting, and more often affects both shoulders in turn. Anyone presenting with a frozen shoulder should have blood sugar checked if it has not been recently, since it is sometimes the first clue.
Is it frozen shoulder or a rotator cuff problem?
In frozen shoulder, movement is restricted in every direction including when someone else moves your arm for you. With a rotator cuff tear, you may be unable to lift the arm yourself, but it can usually be moved passively through a much greater range.
Does a steroid injection help frozen shoulder?
In the painful early stage it is one of the most effective treatments available and often shortens that phase. It is less useful once the shoulder is stiff rather than painful, which is when stretching takes over.
Sources
- NHS — frozen shoulder www.nhs.uk
- MedlinePlus — shoulder injuries and disorders medlineplus.gov
- MedlinePlus — frozen shoulder medlineplus.gov
- NHS — polymyalgia rheumatica www.nhs.uk
This article is general information and does not replace a consultation.