Swelling and irritation of the cover of a tendon that connects muscle to bone.

Tenosynovitis is a painful condition. The hands, wrists and feet most often are affected. Common causes are injury, overuse and infection.

Symptoms include pain and swelling. It might be hard and painful to move the affected joint or to use muscles around the joint. There might be creaking or grating sounds when moving the joint.

Treatment for tenosynovitis not caused by infection includes pain relievers available without a prescription, ice, and sometimes splints or braces to keep the joint from moving. Antibiotics might be needed if the cause is infection. Treatment often involves physical or occupational therapy. Sometimes corticosteroid shots are used.