What Causes Frozen Shoulder and How Is It Treated?
Frozen shoulder is a painful condition that affects the shoulder joint and limits movement over time. Medically known as adhesive capsulitis, frozen shoulder develops when the connective tissues around the shoulder joint become thickened, stiff, and inflamed. Understanding what causes frozen shoulder and how it is treated is important because early treatment can reduce pain, improve mobility, and shorten recovery time.
Frozen shoulder often develops gradually and can make simple daily activities difficult, including dressing, reaching overhead, driving, or sleeping comfortably.
What Is Frozen Shoulder?
Frozen shoulder is a condition that causes:
- Shoulder pain
- Joint stiffness
- Reduced range of motion
- Difficulty moving the arm
The condition affects the capsule surrounding the shoulder joint. As inflammation develops, scar tissue can form, making movement increasingly difficult.
Frozen shoulder usually develops in stages and may take months or even years to fully recover. Learn more
Stages of Frozen Shoulder
Understanding the stages helps explain how frozen shoulder progresses.
1. Freezing Stage
This is the early stage where pain gradually increases.
Symptoms:
- Shoulder pain worsening over time
- Pain at night
- Difficulty moving the arm
- Increasing stiffness
This phase may last several weeks to months.
2. Frozen Stage
Pain may reduce slightly, but stiffness becomes more severe.
Symptoms:
- Limited shoulder movement
- Difficulty performing daily tasks
- Persistent tightness
- Reduced flexibility
The shoulder may feel almost “locked.”
3. Thawing Stage
During this stage, movement slowly improves.
Signs:
- Reduced stiffness
- Improved range of motion
- Less pain
- Gradual return of function
Recovery may still take several months.
What Causes Frozen Shoulder?
Several factors can increase the risk of frozen shoulder.
1. Shoulder Injury or Immobility
One of the most common causes is reduced shoulder movement after injury or surgery.
Examples:
- Rotator cuff injuries
- Shoulder fractures
- Arm immobilization
- Recovery after surgery
Lack of movement can cause the joint capsule to tighten.
2. Diabetes
People with diabetes have a much higher risk of frozen shoulder.
Why diabetes increases risk:
- Higher inflammation levels
- Changes in connective tissue
- Reduced circulation
Frozen shoulder is more common in people with both type 1 and type 2 diabetes.
3. Age and Gender
Frozen shoulder most commonly affects:
- Adults between ages 40 and 60
- Women more than men
Hormonal and aging-related changes may contribute.
4. Other Medical Conditions
Certain health problems may increase risk.
Associated conditions:
- Thyroid disorders
- Heart disease
- Parkinson’s disease
- Stroke recovery
These conditions may affect mobility or inflammation.
5. Poor Posture and Limited Movement
Long periods of poor posture or inactivity can contribute to shoulder stiffness.
Risk factors include:
- Desk jobs
- Sedentary lifestyle
- Lack of stretching
- Muscle imbalance
Healthy movement helps maintain shoulder flexibility.
Symptoms of Frozen Shoulder
Symptoms usually develop gradually.
Common frozen shoulder symptoms:
- Dull or aching shoulder pain
- Pain that worsens at night
- Stiffness
- Difficulty lifting the arm
- Reduced range of motion
- Trouble reaching behind the back
Symptoms may become severe enough to interfere with sleep and daily activities.
How Frozen Shoulder Is Diagnosed
Doctors use several methods to diagnose frozen shoulder.
Diagnosis may include:
- Physical examination
- Range-of-motion testing
- Medical history review
- X-rays
- MRI scans in some cases
Imaging helps rule out other shoulder problems.
How Is Frozen Shoulder Treated?
Treatment focuses on reducing pain and restoring shoulder movement.
1. Physical Therapy
Physical therapy is one of the most effective treatments.
Therapy may include:
- Stretching exercises
- Mobility training
- Shoulder strengthening
- Posture correction
Consistent therapy can improve flexibility over time.
2. Pain Relief Medication
Doctors may recommend medication to manage discomfort.
Common options:
- Anti-inflammatory drugs
- Pain relievers
- Corticosteroid injections
These treatments help reduce inflammation and pain.
3. Heat and Ice Therapy
Simple home treatments can provide relief.
Benefits:
- Heat relaxes stiff muscles
- Ice reduces inflammation and pain
Alternating heat and ice may improve comfort.
4. Gentle Stretching Exercises
Stretching helps maintain shoulder movement.
Helpful exercises:
- Pendulum stretches
- Towel stretches
- Finger walk exercises
- Cross-body stretches
Exercises should be done carefully to avoid worsening pain.
5. Hydrodilatation
This procedure involves injecting fluid into the shoulder capsule.
Purpose:
- Stretch the joint capsule
- Improve movement
- Reduce stiffness
Some patients experience faster improvement after this treatment.
6. Surgery for Severe Cases
Rarely, surgery may be needed if symptoms do not improve.
Surgical options:
- Shoulder manipulation under anesthesia
- Arthroscopic surgery to release tight tissues
Surgery is usually considered after other treatments fail.
How Long Does Frozen Shoulder Last?
Recovery time varies.
Typical timeline:
- Mild cases: several months
- Severe cases: 1–3 years
Most people eventually regain significant shoulder function with treatment.
Can Frozen Shoulder Be Prevented?
While not always preventable, certain habits may reduce risk.
Prevention tips:
- Stay physically active
- Stretch regularly
- Maintain good posture
- Begin movement early after injury
- Follow rehabilitation exercises after surgery
Movement is important for joint health.
Exercises That May Help Prevent Frozen Shoulder
Recommended activities:
- Shoulder rolls
- Wall climbing exercises
- Arm circles
- Resistance band stretching
Regular flexibility exercises help maintain mobility.
When to See a Doctor
Seek medical attention if you experience:
- Persistent shoulder pain
- Severe stiffness
- Difficulty moving the arm
- Sleep disturbances from pain
Early treatment often leads to better recovery.
Read: Understanding Scoliosis: Symptoms, Causes, and Treatment
Final Thoughts
Understanding what causes frozen shoulder and how it is treated can help people recognize symptoms early and seek proper care. Frozen shoulder can significantly affect daily life, but most cases improve with physical therapy, stretching, pain management, and patience. Maintaining shoulder movement, treating underlying health conditions, and following medical advice can support faster recovery and better long-term shoulder health.
