Adhesive Capsulitis
What is Adhesive Capsulitis (Frozen Shoulder)?
Adhesive capsulitis, commonly known as frozen shoulder, is a painful condition that causes stiffness and significant loss of motion in the shoulder joint. It occurs when the capsule, a thick layer of connective tissue that surrounds the shoulder, becomes inflamed and tightens, restricting normal movement.
Over time, this stiffness can interfere with everyday activities such as dressing, reaching overhead, or even sleeping comfortably. Although frozen shoulder often improves gradually, it can take many months to fully recover.
The shoulder is a ball-and-socket joint, made up of three bones—the humerus (upper arm), scapula (shoulder blade), and clavicle (collarbone). The joint capsule surrounds the ball and socket, providing stability while allowing a wide range of motion.
In adhesive capsulitis, this capsule thickens and contracts, forming fibrous adhesions that limit movement and cause pain. Inflammation may also reduce the amount of lubricating fluid (synovial fluid) inside the joint, worsening stiffness.
Unlike arthritis, which involves damage to joint cartilage, frozen shoulder primarily affects the soft tissue capsule around the joint.
Adhesive capsulitis affects approximately 2–5% of the general population, most commonly between the ages of 40 and 60. Women are affected more frequently than men.
Certain medical and lifestyle factors increase risk:
- Diabetes: Frozen shoulder is up to five times more common in people with diabetes.
- Thyroid disorders (hypothyroidism or hyperthyroidism)
- Prolonged shoulder immobilization (after surgery, fracture, or rotator cuff injury)
- Cardiovascular disease
- Autoimmune or inflammatory conditions
Although it can affect either shoulder, once it occurs on one side, there’s a 15–20% chance it may eventually affect the other.
Adhesive capsulitis typically progresses through three overlapping stages that can last from 6 months to over 2 years:
1. Freezing Phase (Painful Phase)
- Gradual onset of shoulder pain that worsens over time.
- Pain is often worse at night or with movement.
- Motion begins to decrease.
- Duration: 2–6 months.
2. Frozen Phase (Stiff Phase)
- Pain may decrease slightly, but stiffness becomes more pronounced.
- Difficulty lifting the arm, reaching overhead, or rotating outward.
- Everyday tasks become challenging.
- Duration: 4–8 months.
3. Thawing Phase (Recovery Phase)
- Pain gradually subsides.
- Range of motion slowly improves.
- Most patients eventually regain near-normal shoulder function.
- Duration: 6–12 months or longer.
Diagnosis begins with a detailed evaluation by Dr. José Vega, Cleveland’s trusted orthopedic shoulder specialist.
Key features on exam:
- Loss of both active and passive range of motion (you cannot move the shoulder, and it cannot be moved for you).
- Stiffness in all directions, especially rotation.
- Diffuse shoulder pain without evidence of mechanical catching or instability.
Imaging studies help confirm the diagnosis and rule out other causes of shoulder pain:
- X-rays are usually normal but can exclude arthritis or calcific tendonitis.
- MRI may show thickening of the joint capsule or inflammation around the rotator interval.
Dr. Vega differentiates frozen shoulder from other conditions such as rotator cuff tears, labral injuries, or bursitis, which can present with similar symptoms but require different treatment.
Treatment focuses on reducing pain, restoring motion, and shortening recovery time. The majority of patients improve with nonsurgical management.
Nonsurgical Treatment
- Physical Therapy: The cornerstone of treatment. Stretching and gentle range-of-motion exercises help restore flexibility. Therapy may begin slowly and intensify as stiffness improves.
- Medications: Nonsteroidal anti-inflammatory drugs (NSAIDs) or acetaminophen can help relieve pain and inflammation.
- Corticosteroid Injections: Targeted injection into the shoulder joint can significantly reduce pain and improve motion, especially in the early stages.
- Hydrodilatation (Capsular Distension): A small amount of sterile fluid is injected into the joint under imaging guidance to stretch and loosen the capsule.
- Home Exercise Program: Consistent daily stretching—pendulum swings, wall climbs, and external rotation stretches—helps maintain progress achieved in therapy.
Most patients improve gradually over several months with these measures.
Surgical Treatment
Surgery is reserved for patients who do not respond to nonsurgical treatment after 6–9 months or who have severe stiffness interfering with daily function.
Two minimally invasive surgical options are available:
- Manipulation Under Anesthesia (MUA): The shoulder is gently moved through its full range of motion while the patient is under anesthesia to break up adhesions.
- Arthroscopic Capsular Release: Using small incisions and a camera, Dr. Vega precisely releases the tight capsule to restore motion. This procedure allows immediate physical therapy afterward for optimal recovery.
Postoperative rehabilitation is essential to prevent the capsule from tightening again. Most patients regain functional range of motion and experience significant pain relief within a few months.
While not all cases are preventable, certain steps can help reduce risk:
- Stay active: Regular shoulder motion helps keep the joint capsule flexible.
- Follow rehabilitation plans after surgery or injury to avoid prolonged immobility.
- Manage diabetes and thyroid conditions, as blood-sugar and hormonal control reduce risk.
- Address shoulder pain early, before stiffness develops.
Adhesive capsulitis—or frozen shoulder—is a common yet treatable cause of shoulder pain and stiffness. With early diagnosis, dedicated physical therapy, and, when necessary, advanced minimally invasive treatments, most patients regain full function and return to pain-free activity. If your shoulder has become increasingly stiff or painful, contact Dr. José Vega’s office in Cleveland to schedule an evaluation and start your recovery today.
References
- Zuckerman JD, Rokito A. Frozen shoulder: a consensus definition. J Shoulder Elbow Surg. 2011;20(2):322–325.
- Hand C, Clipsham K, Rees JL, Carr AJ. Long-term outcome of frozen shoulder. J Shoulder Elbow Surg. 2008;17(2):231–236.
- Wong CK, Levine WN, Deo K, Kesting RS, Mercer EA, Schram GA. Natural history of frozen shoulder: fact or fiction? J Bone Joint Surg Am. 2017;99(9):722–729.
At a Glance
Dr. Jose Vega
- Board-certified orthopedic surgeon
- Fellowship-trained sports medicine specialist
- Author of industry leading peer reviewed publications
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