Frozen shoulder, also known as adhesive capsulitis, is a condition characterized by stiffness and pain in your shoulder joint. Signs and symptoms typically begin gradually, worsen over time and then resolve, usually within one to three years.
Your risk of developing frozen shoulder increases if you're recovering from a medical condition or procedure that prevents you from moving your arm — such as a stroke or a mastectomy.
Treatment for frozen shoulder involves range-of-motion exercises and, sometimes, corticosteroids and numbing medications injected into the joint capsule. In a small percentage of cases, arthroscopic surgery may be indicated to loosen the joint capsule so that it can move more freely.
It's unusual for frozen shoulder to recur in the same shoulder, but some people can develop it in the opposite shoulder.
Frozen shoulder typically develops slowly, and in three stages. Each stage can last a number of months.
For some people, the pain worsens at night, sometimes disrupting sleep.
The bones, ligaments and tendons that make up your shoulder joint are encased in a capsule of connective tissue. Frozen shoulder occurs when this capsule thickens and tightens around the shoulder joint, restricting its movement.
Doctors aren't sure why this happens to some people, although it's more likely to occur in people who have diabetes or those who recently had to immobilize their shoulder for a long period, such as after surgery or an arm fracture.
During the physical exam, your doctor may ask you to move in certain ways to check for pain and evaluate your range of motion (active range of motion). Your doctor might then ask you to relax your muscles while he or she moves your arm (passive range of motion). Frozen shoulder affects both active and passive range of motion.
In some cases, your doctor might inject your shoulder with a numbing medicine (anesthetic) to determine your passive and active range of motion.
Frozen shoulder can usually be diagnosed from signs and symptoms alone. But your doctor may suggest imaging tests — such as X-rays or an MRI — to rule out other problems.
One of the most common causes of frozen shoulder is the immobility that may result during recovery from a shoulder injury, broken arm or a stroke. If you've had an injury that makes it difficult to move your shoulder, talk to your doctor about exercises you can do to maintain the range of motion in your shoulder joint.
Acupuncture involves inserting extremely fine needles in your skin at specific points on your body. Typically, the needles remain in place for 15 to 40 minutes. During that time they may be moved or manipulated. Because the needles are hair thin and flexible and are generally inserted superficially, most acupuncture treatments are relatively painless.
A TENS unit delivers a tiny electrical current to key points on a nerve pathway. The current, delivered through electrodes taped to your skin, isn't painful or harmful. It's not known exactly how TENS works, but it's thought that it might stimulate the release of pain-inhibiting molecules (endorphins) or block pain fibers that carry pain impulses.
Continue to use the involved shoulder and extremity as much as possible given your pain and range-of-motion limits. Applying heat or cold to your shoulder can help relieve pain.
Certain factors may increase your risk of developing frozen shoulder.
People 40 and older, particularly women, are more likely to have frozen shoulder.
People who've had prolonged immobility or reduced mobility of the shoulder are at higher risk of developing frozen shoulder. Immobility may be the result of many factors, including:
People who have certain diseases appear more likely to develop frozen shoulder. Diseases that might increase risk include: