bone, joint, and muscle disorders
Tendinitis and Tenosynovitis
Rotator Cuff Tendinitis
Tendinitis may develop in the tendons of the muscles that help move, rotate, and hold the shoulder in place (rotator cuff). Rotator cuff tendinitis (see Rotator Cuff Injury/Subacromial Bursitis ) is the most common cause of shoulder pain. It causes pain when the arm is raised (particularly between 40° and 120°) or when people dress. People often have pain during the night, especially when they lie on the affected arm. Symptoms of rotator cuff tendinitis may occur suddenly and be severe, especially after physical activity, or they may develop more slowly and be milder. Doctors may do X-Rays to look for calcium deposits in the tendon. Sometimes Range-of-motion exercises , 