What Is Frozen Shoulder? Symptoms, Causes and Evidence-Based Physiotherapy Treatment

Evidence-Based Ways to Reduce Pain, Improve Movement and Restore Shoulder Function

Frozen shoulder can be extremely painful, frustrating, and limiting. Many people struggle with simple daily activities such as dressing, combing hair, reaching overhead, driving, lifting objects, or sleeping comfortably.

The shoulder gradually becomes stiff, painful, and difficult to move. Many patients describe the pain as a deep aching pain that becomes worse at night and more painful with sudden movements.

The good news is that physiotherapy, guided exercises, education, and gradual rehabilitation can significantly improve pain, mobility, and shoulder function in many patients.

What Does Frozen Shoulder Mean?

Frozen shoulder is also known as Adhesive Capsulitis. It is a condition where the capsule surrounding the shoulder joint becomes inflamed, tight, thickened, and stiff.

This causes:

• Pain
• Reduced shoulder movement
• Difficulty using the arm
• Stiffness
• Functional limitations

Over time, the shoulder can become extremely restricted if not managed properly.

Common Symptoms of Frozen Shoulder

People with frozen shoulder commonly experience:

• Shoulder pain
• Severe pain at night
• Difficulty lifting the arm
• Pain reaching overhead
• Difficulty dressing
• Pain turning the arm
• Difficulty reaching behind the back
• Disturbed sleep
• Progressive stiffness
• Reduced shoulder movement

Both active movement and passive movement usually become restricted.

Who Commonly Gets Frozen Shoulder?

Frozen shoulder is more common in:

• Adults aged 40–65 years
• People with diabetes
• Patients after a shoulder injury
• People after surgery
• Individuals with prolonged shoulder immobilisation
• Women (slightly more than men)

Sometimes frozen shoulder develops gradually without a clear reason.

Stages of Frozen Shoulder

Frozen shoulder usually develops slowly in three stages.

1. Freezing Stage

This is the painful stage, which may last between 2–9 months. Pain is usually the main problem during this stage.

Symptoms include:

• Increasing shoulder pain
• Severe night pain
• Gradual stiffness
• Pain with movement

2. Frozen Stage

This stage is mainly characterised by stiffness and may last between 4–12 months.

Symptoms include:

• Significant reduction in movement
• Difficulty with daily activities
• Less severe pain
• Shoulder tightness

Patients commonly struggle with:

• Reaching overhead
• Washing hair
• Dressing
• Reaching behind the back

3. Thawing Stage

During this stage, recovery may continue for several months.

• Pain gradually reduces
• Movement slowly improves
• Function improves

Why Does Frozen Shoulder Pain Become Worse at Night?

Night pain is extremely common with frozen shoulder. This can happen because:

• Inflammation becomes more noticeable during rest
• Pressure increases while lying on the shoulder
• The tight shoulder capsule becomes irritated
• Muscles tighten overnight

Many patients struggle to sleep comfortably due to pain and stiffness.

Importance of Movement

Many people avoid moving the shoulder because of pain. However, complete rest can make stiffness worse.

Gentle, controlled movement is important to maintain:

• Joint mobility
• Flexibility
• Circulation
• Shoulder function

The key is gradual, pain-guided rehabilitation.

Evidence-Based Physiotherapy for Frozen Shoulder

Research strongly supports physiotherapy as one of the most effective treatments for frozen shoulder. Treatment is usually based on the stage of frozen shoulder and individual symptoms.

Physiotherapy may help:

• Reduce pain
• Improve mobility
• Restore shoulder movement
• Improve daily function
• Reduce stiffness
• Improve sleep quality

Manual Therapy and Joint Mobilisation

Physiotherapists commonly use:

• Glenohumeral joint mobilisations
• Capsular stretching
• Passive mobilisation techniques
• Soft tissue release
• Scapular mobilisation

These techniques may help improve:

• Joint mobility
• Shoulder flexibility
• Pain levels
• Movement quality

Research suggests that combining manual therapy with exercises may provide better results than exercise alone.

Mobilisations With Movement (MWM)

Mobilisations With Movement are commonly used physiotherapy techniques. These involve gentle joint glides combined with active shoulder movement.

MWM techniques may help:

• Reduce pain during movement
• Improve shoulder range
• Improve function
• Improve movement confidence

Research supports MWM as an effective treatment option for many shoulder stiffness conditions.

Best Evidence-Based Exercises for Frozen Shoulder

Exercises should be gentle, slow, controlled, and regular. Aggressive, painful stretching is usually not recommended.

1. Pendulum Exercises

• How to perform: Lean forward slightly, relax the arm, and gently swing the arm in circles.
• Benefits: Helps reduce stiffness, encourages movement, and helps with pain relief.

2. Wand Exercises

• How to perform: Hold a stick with both hands and use the unaffected arm to assist movement.
• Benefits: Improves flexibility and encourages safe movement.

3. Wall Climbing Exercise

• How to perform: Slowly walk fingers up the wall. Stop before severe pain.
• Benefits: Improves overhead movement and encourages mobility.

4. Cross-Body Stretch

• How to perform: Gently pull the arm across the chest and hold for 20–30 seconds.
• Benefits: Improves shoulder flexibility and reduces tightness.

5. Sleeper Stretch

• How to perform: Lie on the affected side and gently rotate the forearm downward.
• Benefits: Improves shoulder rotation and helps with capsular tightness.

Important Advice During Exercises

Recommended:

• Gentle daily exercises
• Gradual progression
• Good posture
• Regular movement
• Consistency

Avoid:

• Aggressive stretching
• Sudden jerking movements
• Heavy lifting during painful stages
• Completely stopping movement

Other Treatment Options

Some patients may also benefit from:

• Anti-inflammatory medication
• Steroid injections
• Hydrodilatation
• Pain management strategies

Physiotherapy is usually recommended alongside these treatments.

Recovery Expectations

Frozen shoulder recovery can be slow. Many patients gradually improve with physiotherapy, exercises, education, consistent movement, and patience.

Some patients recover within months, while others may take longer. Early physiotherapy intervention often improves outcomes.

When Should You Seek Physiotherapy?

You should seek a professional assessment if you have:

• Persistent night pain
• Difficulty lifting the arm
• Progressive stiffness
• Difficulty dressing
• Pain affecting sleep
• Reduced shoulder movement
• Difficulty with daily activities

Early treatment can help reduce long-term stiffness and improve recovery.

Final Thoughts

Frozen shoulder can significantly affect daily life, sleep, movement, and confidence. However, evidence-based physiotherapy, stretching exercises, joint mobilisation, and gradual rehabilitation can help improve pain and restore shoulder movement safely. Early assessment and guided rehabilitation often provide the best long-term outcomes.

SAFE REHAB PHYSIO

Professional physiotherapy services helping patients improve:

• Shoulder mobility
• Frozen shoulder stiffness
• Night pain
• Functional movement
• Joint mobility
• Strength
• Rehabilitation at home

Serving patients across Berkshire, Buckinghamshire, Herefordshire and surrounding areas in the UK.

Evidence-Based Information This article is based on evidence-based physiotherapy guidelines and internationally recognised frozen shoulder rehabilitation research.

References

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4. Page MJ, Green S, Kramer S, et al. Manual Therapy and Exercise for Adhesive Capsulitis. Cochrane Database Syst Rev.
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10. Physio-Pedia. Adhesive Capsulitis / Frozen Shoulder Rehabilitation Guidelines.