Frozen shoulder, medically known as adhesive capsulitis, is a painful condition that causes stiffness, restricted movement and difficulty using the shoulder normally. Simple activities such as reaching overhead, putting on a shirt, combing your hair, fastening clothing, reaching behind your back or sleeping on the affected side can become surprisingly difficult.
Unlike ordinary shoulder soreness, frozen shoulder typically develops gradually. The pain may initially be the most noticeable symptom, followed by increasing stiffness and loss of movement. Over time, the shoulder can feel as though it is “stuck” or “frozen.”
Frozen shoulder can improve naturally, but recovery may take many months and, in some cases, considerably longer. A structured treatment approach involving physiotherapy, appropriate exercises, pain management, mobility work and activity modification can help manage symptoms and support the gradual restoration of shoulder function.
What Is Frozen Shoulder?
Frozen shoulder occurs when the capsule surrounding the shoulder joint becomes inflamed, thickened and tight. The shoulder capsule normally provides support while allowing the shoulder to move through a wide range of motion. When the capsule contracts and becomes less flexible, shoulder movement becomes increasingly restricted.
The condition is also called adhesive capsulitis because the tissues around the joint can become contracted and develop adhesions, contributing to restricted movement.
The shoulder is a highly mobile ball-and-socket joint formed by the head of the upper arm bone (humerus) and the socket of the shoulder blade (glenoid). Its extensive mobility allows us to perform activities such as reaching, lifting, dressing and grooming. However, when the joint capsule becomes painful and stiff, these everyday movements can become challenging.
Pain and stiffness are particularly common when trying to rotate the arm outward, reach behind the back or lift the arm overhead.
What Causes Frozen Shoulder?
In many cases, the exact cause of frozen shoulder is not known. This is sometimes referred to as primary or idiopathic frozen shoulder.
However, frozen shoulder can also develop following another condition, injury or period of reduced shoulder movement. This is commonly described as secondary frozen shoulder.
Some factors associated with a higher risk include:
1. Prolonged Immobilisation
Keeping the shoulder still for an extended period following an injury, fracture or surgery can contribute to stiffness and tightening of the joint capsule.
2. Shoulder Injury or Surgery
A shoulder or upper-limb injury can cause a person to naturally avoid moving the arm because of pain. Reduced movement over time may contribute to shoulder stiffness.
3. Diabetes
Frozen shoulder is more commonly seen in people with diabetes. The exact reason for this association is not completely understood, but diabetes is recognised as an important risk factor.
4. Thyroid Disorders
Thyroid problems have also been associated with an increased risk of developing frozen shoulder.
5. Age
Frozen shoulder most commonly affects middle-aged adults. Some clinical resources identify the typical age range as approximately 40–60 years.
6. Other Health Conditions
Certain neurological and systemic conditions, including stroke and Parkinson’s disease, may also be associated with frozen shoulder.
Importantly, you do not need to have any of these risk factors to develop frozen shoulder. It can sometimes occur without an obvious cause.
Symptoms of Frozen Shoulder
The symptoms of frozen shoulder usually develop gradually rather than appearing suddenly.
Common symptoms include:
- Persistent shoulder pain
- Increasing shoulder stiffness
- Difficulty lifting the arm
- Reduced range of motion
- Difficulty reaching overhead
- Difficulty reaching behind the back
- Pain while sleeping
- Increased pain when lying on the affected side
- Difficulty dressing or undressing
- Difficulty combing or washing the hair
- Difficulty reaching into cupboards
- Reduced ability to perform household or work-related activities
One of the characteristic features of frozen shoulder is that both active and passive shoulder movement can become restricted. In other words, not only may the person struggle to move the shoulder themselves, but the shoulder may also remain restricted when movement is assisted.
Night pain is another common complaint and can significantly interfere with sleep.
The Three Stages of Frozen Shoulder
Frozen shoulder is commonly described as progressing through three stages. The duration and severity of each stage can vary considerably from person to person.
Stage 1: Freezing Stage
During the freezing stage, pain gradually develops and becomes more noticeable. Shoulder movement begins to decrease as the condition progresses.
Pain may become worse when moving the arm and is often particularly troublesome at night. As the pain increases, people may unconsciously stop using the affected shoulder, which can contribute to increasing stiffness.
This stage can last for several weeks or months.
Common symptoms during the freezing stage:
- Increasing shoulder pain
- Night pain
- Difficulty sleeping
- Gradually decreasing shoulder movement
- Pain during reaching and lifting
- Difficulty performing normal activities
Stage 2: Frozen Stage
During the frozen stage, the intensity of pain may begin to decrease for some people, but stiffness becomes the dominant problem.
The shoulder may have a significantly reduced range of motion. Activities such as dressing, reaching overhead and reaching behind the back can become particularly difficult.
This stage can also last for several months.
The shoulder may feel as though it has become mechanically restricted, making normal movements difficult even when the pain is not as severe as during the freezing stage.
Stage 3: Thawing Stage
The thawing stage is the recovery phase.
During this stage, shoulder movement gradually improves and daily activities become easier. Pain generally continues to settle, although some discomfort may remain when the shoulder is stretched or loaded.
Recovery is gradual rather than immediate. Frozen shoulder may take many months to resolve, and some cases can take years.
How Is Frozen Shoulder Diagnosed?
A physiotherapist or healthcare professional generally begins with a detailed history and physical examination.
The assessment may include:
- Checking shoulder range of motion
- Comparing the affected and unaffected shoulder
- Assessing active and passive movements
- Evaluating pain patterns
- Assessing shoulder strength
- Checking posture and shoulder-blade movement
- Reviewing previous injuries or surgery
- Identifying possible underlying medical conditions
Imaging is not always necessary to diagnose frozen shoulder. However, an X-ray or other investigation may sometimes be recommended to rule out conditions such as arthritis or other causes of shoulder pain.
Because several shoulder conditions can cause pain and restricted movement, professional assessment is important before beginning an aggressive exercise programme.
How Can Physiotherapy Help With Frozen Shoulder?
Physiotherapy for frozen shoulder focuses on controlling pain, maintaining or improving mobility and gradually restoring functional movement.
Treatment should be tailored to the person’s symptoms, stage of frozen shoulder, movement limitations and functional goals.
1. Pain Management
During the painful phase, controlling symptoms is an important part of rehabilitation.
A physiotherapist may provide advice regarding:
- Activity modification
- Comfortable sleeping positions
- Heat or other symptom-relief strategies
- Appropriate movement levels
- Home exercises
- Load management
The aim is not necessarily to keep the shoulder completely still. Gentle movement within a comfortable range is generally encouraged because prolonged inactivity can contribute to further stiffness.
2. Shoulder Mobility Exercises
Gentle mobility exercises can help maintain and gradually improve shoulder movement.
Depending on the person’s condition, exercises may include:
Pendulum Exercises
The person leans forward while allowing the affected arm to hang comfortably and gently moves it forward and backward or in small circles.
Finger-Walk Exercises
The fingers are used to gradually “walk” the hand upward on a wall, allowing the shoulder to move within a controlled range.
Assisted Shoulder Flexion
The affected arm can be assisted by the opposite arm or an appropriate exercise aid to gradually improve elevation.
Assisted External Rotation
A stick or similar exercise aid can sometimes be used to gently assist outward rotation of the shoulder.
Towel Stretch
A towel can be used to assist controlled shoulder movement behind the back, where appropriate.
The exact exercises, repetitions and intensity should be selected according to the stage and irritability of the condition. Exercises should not be forced aggressively, particularly during the highly painful phase.
3. Manual Therapy and Joint Mobilisation
Physiotherapists may use hands-on techniques to help improve shoulder mobility and reduce stiffness.
Manual therapy can include appropriate joint mobilisation and soft-tissue techniques. These techniques are generally combined with active exercise rather than being used as a standalone treatment.
The goal is to help the patient gradually achieve better movement while maintaining control over pain and symptoms.
4. Strengthening Exercises
As pain decreases and mobility improves, strengthening can become an important component of rehabilitation.
The shoulder muscles, rotator cuff and surrounding musculature need adequate strength and control for normal function.
A physiotherapist may gradually introduce strengthening exercises based on the patient’s range of movement and tolerance.
Strengthening is generally progressed rather than rushed.
5. Posture and Movement Education
Posture does not necessarily cause frozen shoulder, but poor movement habits and prolonged static positions may contribute to discomfort and altered shoulder mechanics.
Physiotherapy may therefore include education on:
- Sitting posture
- Desk ergonomics
- Sleeping positions
- Safe lifting
- Shoulder positioning
- Work-related movements
- Activity modification
This can help patients manage their condition more effectively during everyday life.
Can Frozen Shoulder Be Treated Without Surgery?
In many cases, frozen shoulder can be managed without surgery.
Conservative management may include physiotherapy, home exercises, pain management, activity modification and, when clinically appropriate, medical treatments such as corticosteroid injections.
Research and clinical guidance also support structured physiotherapy as an important treatment option. The UK FROST trial compared structured physiotherapy with other commonly used interventions and found improvements in pain and function across the treatment approaches studied, without one option being clearly superior overall.
Surgical procedures such as manipulation under anaesthesia or arthroscopic capsular release may be considered in selected cases when symptoms remain significantly limiting despite appropriate non-surgical treatment.
Therefore, surgery is not automatically the first step for someone diagnosed with frozen shoulder.
Frozen Shoulder Exercises: What Should You Avoid?
Exercise is an important part of recovery, but more exercise does not necessarily mean faster recovery.
Avoid:
- Forceful stretching
- Heavy shoulder exercises during the painful stage
- Repetitive movements that significantly increase symptoms
- Exercising through sharp or severe pain
- Suddenly increasing exercise intensity
- Keeping the shoulder completely immobilised for prolonged periods
A personalised physiotherapy programme is preferable because the appropriate exercise intensity can change as the condition progresses.
Lifestyle Tips for Managing Frozen Shoulder
Along with physiotherapy, several practical habits can support recovery.
Keep the Shoulder Moving
Avoid unnecessary prolonged immobilisation. Gentle movement within a comfortable range is generally preferable to complete inactivity.
Follow Your Home Exercise Programme
Consistency is important. Short, regular exercise sessions may be more manageable than occasional intense stretching.
Manage Underlying Health Conditions
If you have diabetes or a thyroid condition, following your healthcare professional’s advice for managing the underlying condition is important.
Modify Activities
Temporarily modifying activities that significantly aggravate symptoms can help you remain active without repeatedly irritating the shoulder.
Pay Attention to Sleep
Because frozen shoulder can cause significant night pain, experiment with comfortable sleeping positions and support the affected arm if recommended by your healthcare professional.
When Should You See a Physiotherapist?
Consider seeking professional assessment if shoulder pain or stiffness is:
- Persistent or progressively worsening
- Interfering with sleep
- Limiting arm movement
- Making dressing or grooming difficult
- Affecting work or exercise
- Making everyday activities increasingly difficult
Early assessment can also help distinguish frozen shoulder from other conditions that may cause shoulder pain and restricted movement.
Final Thoughts
Frozen shoulder can be frustrating because recovery is usually gradual. The combination of pain and stiffness can affect everything from sleep and dressing to work, exercise and everyday household activities.
The good news is that frozen shoulder can often be managed with non-surgical treatment. Physiotherapy plays an important role in controlling symptoms, maintaining mobility and gradually restoring shoulder function. Treatment may include education, mobility exercises, stretching, manual therapy, strengthening and a progressive home exercise programme.
Most importantly, frozen shoulder rehabilitation should be individualised. The right treatment depends on the stage of the condition, the severity of pain, available range of motion and the person’s functional goals.
If you are experiencing persistent shoulder pain and stiffness, a physiotherapy assessment at our Physiotherapy Center can help determine whether your symptoms are consistent with frozen shoulder and guide you towards an appropriate rehabilitation programme.
Frequently Asked Questions About Frozen Shoulder
1. What are the early symptoms of frozen shoulder?
Early symptoms commonly include gradually increasing shoulder pain, stiffness, difficulty lifting the arm and pain that may become worse at night. Over time, shoulder movement can become increasingly restricted.
2. Can frozen shoulder heal without surgery?
Yes. Many people can manage frozen shoulder with conservative treatment such as physiotherapy, appropriate exercises, pain management and activity modification. Recovery can be gradual and may take months or longer. Surgical treatment may be considered in selected cases when non-surgical treatment has not provided sufficient improvement.
3. How long does frozen shoulder take to recover?
Recovery varies significantly between individuals. Frozen shoulder commonly progresses through freezing, frozen and thawing phases, and the overall recovery period can extend from several months to years.
4. Is physiotherapy effective for frozen shoulder?
Physiotherapy can help manage frozen shoulder by addressing pain, stiffness, mobility and functional limitations. Treatment may include personalised stretching and mobility exercises, strengthening, manual therapy, education and a home exercise programme. The treatment approach should be adjusted according to the stage and irritability of the condition.
5. Should I exercise if I have a frozen shoulder?
Gentle, controlled movement is generally encouraged, but exercises should be appropriate for your symptoms and stage of recovery. Aggressive or forceful stretching can aggravate pain, particularly during the painful stage. A physiotherapist can recommend suitable exercises and guide their progression.