By Brie Weisman, Occupational Therapist Also published by Commercial Fisheries News Tendonitis is tendon irritation or inflammation caused by repetitive motion. Better known as tennis elbow, it can affect any joint. Symptoms include tenderness, swelling, stiffness, weakness in the affected area, as well as numbness and tingling in extremities. Fishing is the very definition of read more FishAbility for Maine Fishermen: Fishing and Tendonitis