(Tennis Elbow)The lateral epicondyle is the outside bony portion of the elbow where large tendons attach to the elbow from the muscles of the forearm. These tendons can be injured, especially with repetitive motions of the forearm, such as using a manual screwdriver, washing windows, or hitting a backhand in tennis play. Tennis elbow is caused by inflammation of the tendons. Usually, the pain is on the outside of the elbow and might be accompanied by warmth and swelling. The elbow maintains its full range of motion, as the inner joint is not affected, and the pain is usually more noticeable toward the end of the day. Repeated twisting motions or activities that strain the tendon typically cause more pain.

(Golfer’s Elbow)
Golfer’s elbow is characterized by local pain and tenderness over the inner elbow. The range of motion of the elbow is preserved because the inner joint of the elbow is not affected. Those activities which require twisting or straining the forearm tendon can elicit pain and worsen the condition