Tendinitis - also known as tendonitis - is the inflammation of a tendon. It usually happens when a person overuses or injures a tendon during physical activity.
Tendons are cable-like tissues that connect muscles to bones. Although one of their functions is to take some of the strain off the muscles, too much activity can injure them.
Repetitive, overly strenuous exercise can make a tendon inflamed. Also called tendinitis, this inflammation can occur anywhere in the body, including the elbows, ankles, or knees. The affected body part may give the injury its name, such as Achilles tendinitis.
