Adhesive Capsulitis (Frozen Shoulder): Symptoms and Care

Adhesive capsulitis frozen shoulder: Adhesive capsulitis, commonly known as frozen shoulder (in English frozen shoulder), is one of the most disabling pathologies that can affect the shoulder joint. It is characterized by progressive stiffening of the glenohumeral joint capsule, accompanied by intense pain and significant loss of range of motion both active and passive. For more information, see the guide on traumatic capsulitis. For more information, see the guide on Exercises for Painful Shoulder: Complete Protocol.

Proper understanding of the pathology and an adequate rehabilitation program are fundamental to accelerate recovery and prevent complications.

In this complete guide we will analyze in detail what adhesive capsulitis is, what are the causes, the three phases of the disease, specific exercises for each phase and the healing times realistic.

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Table of Contents

• What is Adhesive Capsulitis?
• Causes and Risk Factors
• The 3 Phases of Adhesive Capsulitis
• Diagnosis
• Conservative Treatment
• Exercises for Each Phase of Adhesive Capsulitis
• Sources and Scientific References
• Frequently Asked Questions

What is Adhesive Capsulitis?

Adhesive capsulitis is a pathological condition characterized by inflammation and fibrosis of the joint capsule of the shoulder. The joint capsule is an envelope of connective tissue that surrounds the glenohumeral joint, and when it becomes inflamed it tends to thicken, contract and form adhesions (hence the name “adhesive”).

This process leads to a progressive reduction of joint space and, consequently, to a marked limitation of all shoulder movements: flexion, abduction, external rotation and internal rotation.

Adhesive capsulitis affects about 2-5% of the general population, with a significantly higher prevalence in women (4:1 ratio compared to men) and in the age group between 40 and 60 years. It rarely occurs before 40 years or after 70.

It is important to distinguish adhesive capsulitis from other shoulder pathologies such as rotator cuff injury or supraspinatus tendinitis, which despite presenting pain in the shoulder, have different pathological mechanisms and treatments.

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Causes and Risk Factors

Primary (Idiopathic) Adhesive Capsulitis

In most cases, adhesive capsulitis develops without an apparent cause (idiopathic or primary form). There is no specific trauma or identifiable triggering event. It is believed that there is an abnormal inflammatory response of the joint capsule, probably mediated by autoimmune and neuroinflammatory factors.

Secondary Adhesive Capsulitis

The secondary form develops as a consequence of:

• Trauma or shoulder surgery: a shoulder dislocation, a proximal humerus fracture or an arthroscopic procedure can trigger the fibrotic process
• Prolonged immobilization: the use of braces or bandages for periods exceeding 3-4 weeks is one of the most important risk factors
• Rotator cuff pathologies: a calcific tendinitis or a supraspinatus injury not treated can evolve into capsulitis
• Cardiac surgery or mastectomy: the forced position during surgery and subsequent immobilization

Systemic Risk Factors

Several studies have identified important associated risk factors:

• Diabetes mellitus: the most significant risk factor. Diabetic patients have a 2-4 times higher risk, with a prevalence reaching 10-36% in type 2 diabetics. Capsulitis in diabetics also tends to be more severe and resistant to treatment
• Thyroid diseases: both hypothyroidism and hyperthyroidism increase the risk
• Cardiovascular diseases and hypercholesterolemia
• Dupuytren’s disease: palmar fibrosis is frequently associated with adhesive capsulitis
• Parkinson’s disease
• Female gender and age 40-60 years

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The 3 Phases of Adhesive Capsulitis

Adhesive capsulitis follows a characteristic clinical course divided into three distinct phases, each with specific characteristics. Understanding which phase you are in is fundamental for setting up the most appropriate treatment.

Phase 1 — Freezing Phase

Duration: 2-9 months

This is the most painful phase. The patient feels progressively increasing pain in the shoulder, often described as deep and constant. The pain is typically worse at night and can significantly disturb sleep.

Main characteristics:

• Acute and diffuse pain throughout the shoulder
• Night pain that prevents sleeping on the affected side
• Gradual onset of joint stiffness
• Range of motion begins to reduce, but pain is the predominant symptom
• Pain can radiate down the arm to the elbow

In this phase the patient often confuses the symptoms with those of shoulder tendinitis or generic shoulder pain, delaying correct diagnosis.

Phase 2 — Frozen Phase

Duration: 4-12 months

Pain tends to progressively decrease, but stiffness reaches its maximum. This is the phase when functional limitation is most evident and disabling.

Main characteristics:

• Significant reduction of pain at rest
• Marked stiffness in all directions of movement
• Loss of external rotation (often greater than 50%)
• Difficulty in daily activities: combing hair, fastening bra, reaching objects overhead, putting on jackets
• Pain appears only at extreme movements
• Progressive muscle atrophy due to disuse

Phase 3 — Thawing Phase

Duration: 5-24 months

This is the gradual recovery phase. Range of motion begins slowly to improve and pain reduces further.

Main characteristics:

• Progressive recovery of mobility
• Minimal or absent pain
• Slow but steady improvement
• Complete recovery can take up to 2-3 years from the onset of the first symptoms

Warning: although capsulitis is often described as a “self-limiting” pathology, recent studies show that up to 40% of patients maintain some degree of residual long-term stiffness, and 15% have persistent functional limitations. This underlines the importance of active rehabilitation treatment.

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Diagnosis

The diagnosis of adhesive capsulitis is predominantly clinical, based on:

• Medical history: history of progressive shoulder pain with increasing stiffness, in the absence of significant trauma
• Physical examination: limitation of range of motion both active and passive, particularly external rotation and abduction. A characteristic sign is the loss of passive external rotation with the arm alongside the body
• X-ray: generally normal, useful to exclude arthritis, calcifications or fractures
• Magnetic resonance imaging (MRI): may show thickening of the joint capsule and coracohumeral ligament, and is mainly used to exclude rotator cuff injuries
• Ultrasound: useful for assessing the state of tendons and the subacromial bursa

An important diagnostic criterion is the limitation of passive movement in at least two planes of movement, with a reduction of at least 25% compared to the healthy side.

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Conservative Treatment

Conservative treatment represents the first therapeutic approach in the vast majority of cases and includes several integrated strategies.

Physiotherapy and Rehabilitation

Physiotherapy is the pillar of treatment for adhesive capsulitis. A well-structured rehabilitation program, adapted to the phase of the pathology, can significantly accelerate recovery and improve long-term outcome.

The physiotherapy techniques used include:

• Manual therapy: gradual joint mobilizations (Maitland, Mulligan, Kaltenborn techniques) to improve joint glide
• Progressive capsular stretching: targeted exercises to lengthen the retracted joint capsule
• Assisted active mobilization exercises: the patient actively participates in movement recovery
• Progressive muscle strengthening: in the thawing phase to recover lost strength
• Instrumental physical therapies: high-power laser, tecartherapy, ultrasound for pain and inflammation control

Pharmacological Therapy

• NSAIDs (non-steroidal anti-inflammatory drugs): useful in the freezing phase for pain control
• Oral corticosteroids: short cycles may be considered in the acute phase
• Intraarticular corticosteroid injections: particularly effective in phase 1 to reduce capsular inflammation. Clinical studies demonstrate significant improvement in pain and ROM in the first 6-12 weeks
• Hydrodilatation (capsular distension): injection of saline solution and cortisone under ultrasound guidance to mechanically distend the retracted capsule

Other Therapeutic Options

• Manipulation under anesthesia: forced mobilization of the joint under general anesthesia. Reserved for cases resistant to conservative treatment for at least 6 months
• Arthroscopic capsular release: minimally invasive surgical procedure in which the retracted capsule is sectioned. Indicated in the most severe and refractory cases

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Exercises for Each Phase of Adhesive Capsulitis

A program of home exercises is essential for successful treatment. Exercises must be adapted to the phase of the pathology and patient tolerance. The fundamental rule is: never force through acute pain.

Exercises for the Freezing Phase (Phase 1)

In this phase pain is predominant. Exercises should be gentle, low intensity and mainly aimed at maintaining residual movement and pain control.

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Exercise 1: Codman Pendulum

Difficulty: Easy | Equipment: Table or stable chair | Duration: 2-3 minutes

Starting position:
Standing beside a table or stable chair. Lean forward with your torso at about 45-60 degrees, resting the hand of the healthy arm on the support surface. The affected arm hangs freely downward, completely relaxed.

Step-by-step execution:

1. Step 1: Leave the affected arm completely relaxed, without any muscle contraction. The weight of the arm itself generates gentle traction on the joint capsule.
2. Step 2: Gently shift your body weight to make the arm swing in small circles clockwise (10 circles), then counterclockwise (10 circles).
3. Step 3: Continue with back-and-forth oscillations (10 repetitions) and then lateral right-left (10 repetitions).

Sets and repetitions: 2-3 minutes of continuous oscillations — Repeat 3-4 times daily

Common mistakes to avoid:

• Contracting the shoulder muscles during movement: the arm must swing passively
• Making circles too wide that generate pain
• Using additional weights in this phase

How to know you’re doing it right:
You feel a slight sense of decompression and relief in the shoulder joint. The movement is fluid, without jerks or pain. The arm swings with minimal effort.

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Exercise 2: Passive external rotation mobilization with stick

Difficulty: Easy | Equipment: Stick or broom handle | Duration: 5 minutes

Starting position:
Lie supine on a flat surface (mat or bed). Elbows bent at 90 degrees and close to the sides. Hold a stick with both hands, with hands at shoulder width.

Step-by-step execution:

1. Step 1: Keeping elbows close to the sides, use the healthy arm to slowly push the stick toward the side of the affected arm, bringing it into external rotation.
2. Step 2: Continue until you feel slight tension in the affected shoulder (never acute pain). Stop at that point.
3. Step 3: Hold the reached position for 15-20 seconds, breathing deeply and relaxing the shoulder muscles. Slowly return to the starting position.

Sets and repetitions: 10 repetitions — Repeat 2-3 times daily

Common mistakes to avoid:

• Lifting the elbow from the side during rotation
• Pushing too quickly or with excessive force
• Holding your breath during position maintenance

How to know you’re doing it right:
You feel a stretching tension in the front of the shoulder, without acute pain. Over the days you notice a gradual increase in the rotation range achievable.

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Exercise 3: Modified sleeper stretch (posterior capsule stretching)

Difficulty: Easy | Equipment: Mat | Duration: 5 minutes

Starting position:
Lie on the side of the affected arm, on a mat. The affected shoulder is flexed at 90 degrees (arm forward), elbow bent at 90 degrees with the forearm facing the ceiling. Knees slightly bent for stability.

Step-by-step execution:

1. Step 1: Place the hand of the healthy arm on the forearm of the affected arm, just below the wrist.
2. Step 2: Gently push the forearm downward (toward the floor), bringing the shoulder into internal rotation. Proceed slowly until you feel mild tension in the back of the shoulder.
3. Step 3: Hold the position for 15-20 seconds, then slowly release and return to the starting position.

Sets and repetitions: 8-10 repetitions — 1-2 times daily

Common mistakes to avoid:

• Pushing too hard causing pain in the back of the shoulder
• Rotating the torso backward during the push, losing the correct side-lying position
• Positioning the shoulder too high or too low relative to 90 degrees

How to know you’re doing it right:
You feel a stretching tension in the back of the shoulder, which should never become pain. The tension decreases slightly during position maintenance.

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Exercise 4: Passive supine flexion

Difficulty: Easy | Equipment: Mat | Duration: 5 minutes

Starting position:
Lie supine on a mat, with legs extended or knees bent for lumbar comfort. Grasp the wrist of the affected arm with the hand of the healthy arm.

Step-by-step execution:

1. Step 1: With the healthy hand, guide the affected arm upward by slowly lifting it from the body, keeping the elbow extended.
2. Step 2: Continue the movement bringing both arms toward the head, as if reaching the floor beyond the head. Stop at the point where you feel tolerable tension in the affected shoulder.
3. Step 3: Hold the reached position for 15-20 seconds, breathing in a relaxed manner. Slowly return arms to starting position.

Sets and repetitions: 10 repetitions — 2-3 times daily

Common mistakes to avoid:

• Excessively arching the back during arm lifting
• Forcing movement beyond the pain threshold
• Performing the movement too quickly, without giving tissues time to adapt

How to know you’re doing it right:
You feel a stretching sensation in the front and top of the shoulder. The supine position allows complete muscle relaxation, and the movement is smooth and controlled.

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Important warnings for Phase 1:

• Apply ice for 15-20 minutes after exercises if pain increases
• Avoid sudden movements and forcing
• Exercises should never cause pain greater than 3-4/10 on the VAS scale
• Prefer exercises in supine position, which unloads the weight of the arm

Exercises for the Frozen Phase (Phase 2)

In this phase stiffness is the main problem and pain is more manageable. Exercises become progressively more intense and aimed at range of motion recovery.

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Exercise 1: Codman pendulum with light weight

Difficulty: Easy | Equipment: Table, 0.5-1 kg dumbbell | Duration: 3-5 minutes

Starting position:
Standing beside a table, leaning forward at 45-60 degrees with the healthy hand resting on the surface. The affected arm hangs freely with a 0.5-1 kg weight in the hand.

Step-by-step execution:

1. Step 1: Start with small circular oscillations clockwise, gradually increasing the diameter of circles based on tolerance. Perform 15-20 circles.
2. Step 2: Reverse direction and perform 15-20 counterclockwise circles, trying to achieve the same amplitude.
3. Step 3: Continue with back-and-forth and lateral oscillations, 15-20 oscillations per direction, using the weight’s momentum to gain amplitude.

Sets and repetitions: 3-5 minutes of continuous oscillations — Repeat 3-4 times daily

Common mistakes to avoid:

• Using too heavy a weight that causes defensive muscle contraction
• Forcing circles too wide that cause acute pain
• Actively contracting shoulder muscles instead of letting the weight oscillate

How to know you’re doing it right:
The arm swings smoothly and relaxed, with greater amplitude than the previous phase. You feel gentle traction in the joint, without pain. The weight helps to progressively gain more amplitude.

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Exercise 2: Wall climbing

Difficulty: Intermediate | Equipment: Free wall, marker sticker | Duration: 5 minutes

Starting position:
Standing facing the wall, at a distance equal to arm’s length. Feet at shoulder width. Fingers of the affected arm’s hand placed on the wall at waist height.

Step-by-step execution:

1. Step 1: “Climb” with fingers along the wall, taking small steps with fingers upward. Gradually raise the arm, maintaining finger contact with the wall.
2. Step 2: Continue climbing until reaching the maximum tolerable point. Mark that point with a sticker as reference for subsequent sessions.
3. Step 3: Hold the maximum position for 5-10 seconds, then slowly descend with fingers. Repeat both frontally (for flexion) and laterally (for abduction), positioning yourself with the affected side toward the wall.

Sets and repetitions: 10-15 repetitions per direction — Repeat 3 times daily

Common mistakes to avoid:

• Getting too close to the wall to compensate and “cheat” on the height reached
• Lifting the shoulder toward the ear during climbing (trapezius compensation)
• Forcing beyond the pain threshold to surpass the previous mark

How to know you’re doing it right:
The movement is slow and controlled, without torso compensations. Over days the mark on the wall moves progressively higher. The shoulder remains low and relaxed during climbing.

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Exercise 3: Towel stretch for internal rotation

Difficulty: Intermediate | Equipment: Towel | Duration: 5 minutes

Starting position:
Standing with straight back. Bring the healthy hand over the corresponding shoulder, holding one end of the towel. With the affected arm’s hand, grasp the other end of the towel behind the back, at buttock level.

Step-by-step execution:

1. Step 1: Gently pull the towel upward with the healthy hand, making the affected hand slide along the back toward the shoulder blades.
2. Step 2: Continue traction until you feel tension in the front of the affected shoulder and in internal rotation. Never exceed the pain threshold.
3. Step 3: Hold the reached position for 15-30 seconds, then slowly release tension and return to starting position.

Sets and repetitions: 10 repetitions — 2 times daily

Common mistakes to avoid:

• Pulling with excessive force causing acute pain in the affected shoulder
• Leaning the torso forward to compensate for lack of mobility
• Using too short a towel that prevents comfortable grip

How to know you’re doing it right:
You feel progressive stretching in the front of the shoulder and in the affected arm region. Over time the affected hand climbs higher and higher along the back.

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Exercise 4: External rotation with elastic

Difficulty: Intermediate | Equipment: Light resistance elastic, door handle | Duration: 5 minutes

Starting position:
Attach a light resistance elastic to a closed door handle. Position yourself standing laterally to the door, with the affected arm side facing away from the elastic. Elbow bent at 90 degrees and close to the side. Grip the elastic with the affected arm’s hand.

Step-by-step execution:

1. Step 1: Starting with the forearm facing the elastic (in front of the body), slowly rotate the forearm outward against the elastic resistance.
2. Step 2: Reach maximum tolerable external rotation, keeping the elbow firmly at the side throughout the movement.
3. Step 3: Slowly return to starting position controlling the elastic return (eccentric phase). Don’t let the elastic snap the arm back abruptly.

Sets and repetitions: 3 sets x 10-12 repetitions — 30 second rest between sets

Common mistakes to avoid:

• Lifting the elbow from the side during rotation
• Using too resistant an elastic that prevents controlled execution
• Rotating the torso instead of just the shoulder

How to know you’re doing it right:
You feel the work of the external rotator muscles (back of shoulder) without joint pain. The elbow remains firmly in contact with the side throughout the movement.

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Exercise 5: Cross-body stretch (posterior capsule stretching)

Difficulty: Easy | Equipment: None | Duration: 5 minutes

Starting position:
Standing with straight back. Lift the affected arm in front of the body at shoulder height, with elbow extended.

Step-by-step execution:

1. Step 1: Bring the affected arm horizontally across the chest, toward the opposite shoulder.
2. Step 2: With the hand of the healthy arm, grasp the elbow or back of the affected arm and gently pull toward the opposite shoulder, increasing the stretch.
3. Step 3: Hold the position for 30 seconds, breathing deeply and trying to relax the shoulder muscles. Release slowly.

Sets and repetitions: 5-8 repetitions — 2 times daily

Common mistakes to avoid:

• Lifting the affected shoulder toward the ear during stretch
• Rotating the torso in the arm direction, nullifying the stretching effect
• Pulling abruptly or too hard

How to know you’re doing it right:
You feel a stretch in the back of the affected shoulder. The tension remains constant and tolerable during the 30 seconds of maintenance.

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Exercise 6: Active assisted flexion with pulley

Difficulty: Intermediate | Equipment: Door pulley, chair | Duration: 5 minutes

Starting position:
Install a simple pulley (available at medical supply or sports stores) on top of a door. Sit on a chair under the pulley. Grasp one end of the rope with each hand.

Step-by-step execution:

1. Step 1: Pull down with the healthy arm to passively lift the affected arm through the pulley mechanism. The affected arm should remain relaxed.
2. Step 2: Lift the affected arm to the maximum tolerable point, without causing acute pain. Hold the position for 5-10 seconds at the top.
3. Step 3: Slowly release tension with the healthy arm, making the affected arm descend in a controlled manner to the starting position.

Sets and repetitions: 15-20 repetitions — Repeat 2-3 times daily

Common mistakes to avoid:

• Actively contracting muscles of the affected arm instead of letting it be guided passively
• Lifting too rapidly, causing acute pain
• Arching the back to compensate for lack of shoulder mobility

How to know you’re doing it right:
The affected arm rises gradually and controlled, without acute pain. You feel a stretching tension in the shoulder that decreases slightly during top maintenance. The achievable height increases progressively over weeks.

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Exercises for the Thawing Phase (Phase 3)

In this phase the focus shifts to complete range of motion recovery and muscle strengthening. Exercises become more demanding.

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Exercise 1: Active stretching in all directions

Difficulty: Intermediate | Equipment: None | Duration: 8-10 minutes

Starting position:
Standing with feet at shoulder width, straight back and relaxed shoulders. Perform three stretching movements in sequence.

Step-by-step execution:

1. Step 1 — Complete flexion: Interlace fingers of both hands. Lift arms overhead and stretch toward the ceiling. Hold 30 seconds. Repeat 3-5 times.
2. Step 2 — Abduction: Lift affected arm laterally upward, assisting with healthy hand if necessary. Try to reach maximum lateral elevation. Hold 30 seconds. Repeat 3-5 times.
3. Step 3 — External rotation in abduction: Bring affected arm to 90 degrees abduction, elbow bent at 90 degrees (“candelabra” position). Rotate forearm upward and backward, bringing shoulder to maximum external rotation. Hold 30 seconds. Repeat 3-5 times.

Sets and repetitions: 3-5 repetitions for each direction — 2 times daily

Common mistakes to avoid:

• Compensating lack of mobility with back arching
• Skipping one of the three directions favoring only the easiest one
• Holding positions for too little time (less than 20 seconds)

How to know you’re doing it right:
You feel progressive stretching in each direction without acute pain. Over weeks you notice a clear increase in achievable range in all three directions.

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Exercise 2: Rotator cuff strengthening with elastics

Difficulty: Intermediate | Equipment: Medium resistance elastic | Duration: 10 minutes

Medical disclaimer: The information in this article is for educational and informational purposes only. It does not replace the advice of a doctor or physiotherapist. For diagnosis and treatment, please consult your trusted doctor or physiotherapist.

For a broader overview of related conditions, see our complete guide to shoulder pain.

Sources and Scientific References

1. Nakandala P et al. (2021). The efficacy of physiotherapy interventions in the treatment of adhesive capsulitis: A systematic review. J Back Musculoskelet Rehabil. 34:195-205. DOI | PubMed
2. Ramirez J (2019). Adhesive Capsulitis: Diagnosis and Management. Am Fam Physician. 99:297-300. PubMed
3. Kirker K et al. (2023). Manual therapy and exercise for adhesive capsulitis: a systematic review with meta-analysis. J Man Manip Ther. 31:311-327. DOI | PubMed
4. Redler LH et al. (2019). Treatment of Adhesive Capsulitis of the Shoulder. J Am Acad Orthop Surg. 27:e544-e554. DOI | PubMed
5. Page MJ et al. (2014). Manual therapy and exercise for adhesive capsulitis (frozen shoulder). Cochrane Database Syst Rev. 2014:CD011275. DOI | PubMed

Frequently Asked Questions

What is Adhesive Capsulitis, commonly known as Frozen Shoulder?

Adhesive capsulitis is a disabling condition characterized by progressive stiffening of the glenohumeral joint capsule, accompanied by intense pain and significant loss of active and passive range of motion. It involves inflammation and fibrosis of the joint capsule, causing it to thicken, contract, and form adhesions. This process leads to a marked limitation of all shoulder movements.

Who is most commonly affected by Adhesive Capsulitis?

Adhesive capsulitis has a significantly higher prevalence in women, with a 4:1 ratio compared to men. It typically affects individuals in the age group between 40 and 60 years old. It rarely occurs before 40 or after 70 years of age.

What are the main causes and risk factors for Adhesive Capsulitis?

In most cases, adhesive capsulitis develops without an apparent cause (primary or idiopathic form), believed to involve an abnormal inflammatory response. Secondary forms can be triggered by trauma, shoulder surgery, or prolonged immobilization, such as from using braces or bandages for periods exceeding 3-4 weeks.

How does Adhesive Capsulitis affect shoulder movement?

The inflammation and fibrosis of the joint capsule cause it to thicken, contract, and form adhesions, progressively reducing the joint space. This leads to a marked limitation of all shoulder movements, including flexion, abduction, external rotation, and internal rotation. Patients experience significant loss of both active and passive range of motion.

Is Adhesive Capsulitis the same as other shoulder conditions like rotator cuff injury?

No, it is important to distinguish adhesive capsulitis from other shoulder pathologies such as rotator cuff injury or supraspinatus tendinitis. While they may all present with shoulder pain, they have different pathological mechanisms and require distinct treatment approaches. A proper diagnosis from a trusted doctor or physical therapist is crucial for effective management.