Tennis elbow, also known as lateral epicondylitis, is a common overuse injury of the forearm muscles and tendons that attach to the lateral epicondyle of the humerus. Despite its name, it can occur in individuals who don't play tennis. Repetitive motions, such as gripping and twisting, can lead to pain and inflammation in the outer part of the elbow. Rest, physical therapy, and sometimes bracing or corticosteroid injections are typical treatments for tennis elbow.