Tendonitis is the irritation and inflammation of the tendon, which is the structure that connects the muscle to the bone. One of the most frequent types is tendonitis of the wrist or hand, which may be caused by an overexertion of the joint or by a twist. The most obvious symptom is pain in the joint which can spread to the fingers and palmar area. The goal of the treatment is to reduce pain and inflammation. For this purpose, the affected area is immobilized with a splint or a cast.