Frozen Shoulder Causes, Symptoms & Treatment Options
A frozen shoulder, also known as adhesive capsulitis, is a condition in which the shoulder joint becomes painful, stiff, and difficult to move. The condition develops gradually and can significantly limit daily activities such as dressing, reaching overhead, or sleeping comfortably. With appropriate frozen shoulder treatment and time, most individuals recover full shoulder motion. Frozen shoulder typically progresses through three distinct stages, each with characteristic symptoms and limitations.
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1. Freezing Stage
This is the earliest and most painful phase of frozen shoulder. Pain develops gradually and worsens with movement, particularly at night. During this stage:
- Shoulder pain increases steadily
- The range of motion begins to decrease
- Daily activities become difficult
This stage usually lasts 2 to 6 months and is often when patients first seek medical care.
2. Frozen Stage
In this phase, shoulder pain may begin to lessen, but stiffness becomes more pronounced. Key features include:
- Persistent limitation in shoulder movement
- Difficulty with activities like reaching overhead or behind the back
- Reduced pain compared to the freezing stage
This stage typically lasts 3 to 6 months.
3. Thawing Stage
The final stage is marked by gradual improvement in shoulder mobility. During this period:
- The range of motion slowly returns
- Pain continues to decrease
- Functional use of the shoulder improves
The thawing stage may last 3 to 12 months, depending on the severity of the condition and adherence to treatment..
What causes Frozen Shoulder?
The exact cause of frozen shoulder is not completely understood, but it develops due to inflammation and tightening of the shoulder capsule, which restricts joint movement.
1. How Frozen Shoulder Develops
Frozen shoulder occurs when the connective tissue surrounding the shoulder joint thickens and tightens. Over time:
- Inflammation leads to scar tissue formation
- The joint capsule becomes stiff
- Normal shoulder motion is restricted
Prolonged immobility or pain with movement can accelerate this process.
2. Common Causes and Risk Factors
Frozen shoulder may develop after:
- Shoulder injuries such as rotator cuff tears or fractures
- Surgery requiring shoulder immobilization
- Prolonged lack of shoulder movement
Certain medical conditions increase the risk of developing frozen shoulder, including:
- Diabetes
- Thyroid disorders
- Cardiovascular disease
- Autoimmune conditions
In many cases, frozen shoulder develops without a clear injury, known as idiopathic adhesive capsulitis.
Symptoms
Frozen shoulder symptoms usually begin gradually and worsen over time. Common symptoms include:
- A deep, aching shoulder pain that worsens with movement
- Increased pain at night, especially when lying on the affected side
- Progressive shoulder stiffness
- Limited active and passive range of motion
As the condition advances, pain may decrease, but stiffness and functional limitation often persist until the thawing stage.
When to see a doctor
You should see a doctor if shoulder pain and stiffness:
- Persist despite rest and home care
- Interfere with daily activities or sleep
- Do not improve with NSAIDs or activity modification
.Your physician will examine your shoulder and assess both active and passive range of motion. Active motion is how far you can move your shoulder on your own, while passive motion is how far the doctor can move your shoulder for you when your muscles are relaxed. If both active and passive motion are limited, frozen shoulder is strongly suspected.
Imaging tests such as X-rays or MRI scans may be ordered to rule out other causes of shoulder pain, such as arthritis or rotator cuff injuries. In cases of a isolated frozen shoulder, imaging results are often normal.
Non-operative treatment
Most people with frozen shoulder recover without surgery. Non-operative frozen shoulder treatment focuses on reducing pain and gradually restoring motion.
Common Non-Surgical Treatments Include:
- NSAIDs to decrease pain and inflammation
- Corticosteroid injections to reduce joint inflammation and pain
- Home stretching programs
- Physical therapy guided by a licensed therapist
Frozen Shoulder Exercises
Frozen shoulder exercises are essential for recovery and should focus on gentle stretching rather than strength training. These exercises help:
- Improve shoulder mobility
- Reduce stiffness
- Prevent further loss of motion
(Refer to the provided PDF for a guided Frozen Shoulder Exercise Program.)
Surgical Treatment
Surgery is rarely needed but may be recommended if non-operative frozen shoulder treatment fails to improve motion.
Surgical Options Include:
- Manipulation under anesthesia, where the surgeon gently moves the shoulder to break up scar tissue
- Arthroscopic lysis of adhesions, which involves removing scar tissue using minimally invasive techniques
Post-surgical physical therapy is critical to maintain the restored range of motion and prevent recurrence.
Recovery
Recovery from frozen shoulder can be slow and requires patience. In some cases, full recovery may take 12 months or longer. Although the process can be frustrating, most individuals eventually:
- Regain full shoulder motion
- Become pain-free
- Return to normal daily activities
Consistent adherence to frozen shoulder exercises and therapy plays a key role in successful recovery.
Dr. Jay Kimmel is a board-certified orthopedic surgeon specializing in sports medicine, arthroscopic surgery, and shoulder and knee disorders. He completed his orthopedic training at New York-Presbyterian/Columbia University Medical Center and a Sports Medicine Fellowship at Temple University.
Dr. Kimmel previously served as the Director of the Connecticut Sports Medicine Institute at Saint Francis Hospital and has held faculty appointments as Clinical Assistant Professor in the Departments of Orthopedics and Family Medicine at the University of Connecticut. He has extensive experience caring for athletes as a team physician for high school and collegiate programs and continues to teach in the athletic training departments at Westfield State University and Springfield College.
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/MonthFrequently Asked Questions
What is the most common reason for a frozen shoulder?
Prolonged shoulder immobility after injury or surgery, especially in people with diabetes.
What is the most suitable exercise for a frozen shoulder?
Gentle stretching exercises, such as pendulum swings and passive range-of-motion stretches, are most effective.
Which muscles are impacted by frozen shoulder?
While the muscles themselves are not injured, stiffness in the joint capsule limits movement of the rotator cuff and surrounding shoulder muscles.
Can Nerve damage cause frozen shoulder?
Nerve damage does not directly cause frozen shoulder but may contribute by limiting movement and promoting stiffness over time.