Adhesive Capsulitis Causes Symptoms Stages and Treatment for Frozen Shoulder
A shoulder that slowly becomes painful, stiff, and hard to move can affect almost every part of daily life. Reaching for a seat belt, washing hair, putting on a coat, or sleeping on one side can suddenly feel difficult. One common reason is adhesive capsulitis, often called frozen shoulder.
Adhesive capsulitis is usually not dangerous, but it can be frustrating and slow to improve. The good news is that most people recover with time, the right exercises, and support from a GP, Osteopath, or specialist when needed.
This article is for general information only and is not a substitute for medical advice. Anyone with severe pain, sudden weakness, recent injury, fever, chest pain, or symptoms spreading down the arm should seek medical care promptly.
What adhesive capsulitis means
Adhesive capsulitis happens when the capsule around the shoulder joint becomes inflamed, thickened, and tight. The shoulder is a ball-and-socket joint, and the capsule is a flexible sleeve of tissue that helps hold it together.
When this capsule becomes irritated and less elastic, the shoulder cannot glide and rotate as freely as it should. This leads to pain and stiffness.
A key feature is that both active movement and passive movement become limited.
Active movement means moving the arm yourself.
Passive movement means someone else, such as a clinician, gently moves the arm for you.
With many shoulder problems, passive movement stays fairly normal. With adhesive capsulitis, even assisted movement can feel blocked, especially when turning the arm outwards or lifting it overhead.
Causes and risk factors
The exact cause is not always clear. In many cases, frozen shoulder develops without one obvious trigger. This is sometimes called primary adhesive capsulitis.
It can also happen after something reduces shoulder movement for a while. This is known as secondary adhesive capsulitis. Examples include:
A shoulder injury
Surgery involving the shoulder, arm, breast, or chest
A period in a sling
Recovery after a stroke
Long-term guarding because of pain
Some health conditions are linked with a higher risk. These include diabetes, thyroid disorders, heart disease, and Parkinson’s disease. People in midlife are more commonly affected, though it can happen outside this age range too.
Having a risk factor does not mean someone will definitely develop the condition. It simply means the shoulder may be more prone to stiffness and capsular tightness.
Common symptoms to recognise
Adhesive capsulitis often starts gradually. At first, it may feel like a dull ache around the outer shoulder or upper arm. Over time, stiffness becomes more noticeable.
Common symptoms include:
Pain that is worse at night
Difficulty lying on the affected side
Trouble reaching overhead
Difficulty reaching behind the back
Pain when fastening a bra, putting on a jacket, or reaching into a back pocket
Reduced ability to rotate the arm outwards
A feeling that the shoulder is “stuck” rather than simply sore
Pain can travel part of the way down the upper arm, but it usually does not pass far below the elbow. Numbness, tingling, or marked weakness may suggest another issue and should be checked.
The stages of adhesive capsulitis
Frozen shoulder usually moves through stages. The timing varies from person to person, and the stages can overlap.
Stage | What it feels like | How mobility changes |
Freezing stage | Pain increases, often with sharp pain at end range | Movement starts to reduce because pain and tightness limit use |
Frozen stage | Pain may ease slightly, but stiffness is more obvious | Daily tasks become harder, especially reaching up or behind |
Thawing stage | Pain and stiffness gradually improve | Range of motion slowly returns with time and exercise |
The full course can take many months, and sometimes longer. That can feel discouraging, but slow progress is still progress. The goal is to protect function, reduce pain, and keep the shoulder moving safely while the capsule settles.
How it affects everyday mobility
The shoulder is involved in more tasks than many people realise. Adhesive capsulitis can affect personal care, work, sleep, driving, exercise, and household tasks.
Movements that often become difficult include:
Reaching into a high cupboard
Putting on a jumper or coat
Washing or brushing hair
Tucking in a shirt
Reaching across the body
Lifting objects away from the body
Because the shoulder loses rotation, people may start compensating with the neck, back, or shoulder blade. This can lead to extra muscle tension. A physiotherapist can help identify these patterns and suggest safer ways to move.
Treatment options that may help
Treatment depends on the stage, pain level, medical history, and how much daily life is affected. Most plans combine pain control with gradual movement work.
Physical therapy and guided exercise
Physiotherapy is often central to treatment. A physiotherapist may use:
Gentle stretching
Range of motion exercises
Advice on posture and shoulder blade movement
Strengthening when pain allows
Manual techniques to improve joint mobility
A home exercise plan
In the early painful stage, aggressive stretching can sometimes worsen symptoms. The aim is usually gentle, consistent movement, not forcing the shoulder through severe pain.
As pain settles, exercises can become more focused on restoring motion and strength.
Medications for pain and inflammation
Medication may help reduce pain enough to keep moving and sleeping better. Options may include paracetamol or anti-inflammatory medicines such as ibuprofen, if suitable.
Anti-inflammatory medicines are not safe for everyone. People with stomach ulcers, kidney disease, certain heart conditions, asthma triggered by anti-inflammatories, or those taking blood thinners should check with a healthcare professional first.
A corticosteroid injection into the shoulder joint may be suggested for some people, especially during the painful stage. It can help reduce inflammation and make physiotherapy more tolerable. The benefit can vary, and it should be discussed with a clinician.
Other procedures
If symptoms remain severe despite conservative care, a specialist may discuss other treatments. These can include hydrodilatation, where fluid is injected into the joint to stretch the capsule, or surgery in selected cases.
Two surgical options sometimes used are manipulation under anaesthetic and arthroscopic capsular release. These are usually considered only when stiffness is persistent and significantly affects function.
Practical tips for managing pain and improving movement
Small daily habits can make the condition easier to live with.
Try these supportive strategies:
Use heat before exercises A warm shower or heat pack may help the shoulder feel looser.
Use ice after flare-ups A cold pack wrapped in a towel may calm soreness after activity.
Keep exercises gentle Stretch to a mild to moderate pull, not sharp pain.
Move little and often Short sessions are often easier than one long session.
Support the arm during sleep A pillow under the forearm can reduce night discomfort.
Avoid long periods of complete rest Resting the shoulder fully for too long may increase stiffness.
Modify tasks Keep commonly used items at waist or chest height for a while.
Helpful exercises often include pendulum swings, wall walks, table slides, towel stretches, and assisted external rotation with a stick. These should be adapted to the stage of the condition and any other shoulder problems.
A steady approach usually works best
Adhesive capsulitis can be painful, slow, and limiting, but it often improves with the right support. Understanding the stages helps set realistic expectations. Pain control, physical therapy, and gentle home exercises can reduce discomfort and help restore range of motion over time.
The most useful next step is to get a clear diagnosis and a plan that matches the stage of the condition. With patience and consistent care, the shoulder can gradually become less painful, less stiff, and easier to use again.
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