Adhesive capsulitis and frozen shoulder are both types of shoulder pain caused by a reduction in the range of motion of the shoulder joint. However, there are some key differences between the two:
Symptoms
Adhesive capsulitis is characterized by a gradual onset of shoulder pain and stiffness. The pain is usually localized to the shoulder joint, and it can be quite severe at times. The range of motion of the shoulder is usually limited and this can make activities such as reaching overhead and behind the back difficult.
Frozen shoulder is also characterized by shoulder pain and stiffness, but the onset is usually more sudden. The pain is usually more widespread and can radiate down the arm. The range of motion of the shoulder is severely limited, and movement of the shoulder can be very painful.
Treatment
Adhesive capsulitis is usually treated with physical therapy, anti-inflammatory medications, and, in severe cases, corticosteroid injections. Physical therapy focuses on stretching and strengthening exercises to improve range of motion and reduce pain.
Frozen shoulder is usually treated with physical therapy, anti-inflammatory medications, and, in severe cases, corticosteroid injections. In addition, manipulation of the shoulder under anesthesia may be used to break up the scar tissue that has formed around the joint.
Outcome
Adhesive capsulitis usually resolves within a few months to a year with proper treatment. In some cases, the shoulder may not regain full range of motion.
Frozen shoulder usually takes anywhere from 1 to 3 years to fully resolve, and even then, the shoulder may not regain full range of motion.