Lateral epicondylitis (tennis elbow) and medial epicondylitis (golfer’s elbow) both occur when the tendon attachment of the muscle to the bone at the elbow becomes damaged. This causes inflammation, resulting in pain and tenderness. In tennis elbow, the tendon on the outer side of the elbow is affected. Golfer’s elbow affects the tendon on the inner side.
Both conditions are caused by repeated twisting movements of the forearm. In tennis elbow and golfer’s elbow, the pain is made worse by using the affected arm.
Both conditions usually clear up with self-help measures to relieve symptoms, such as rest, ice packs, and pain relievers.
In severe cases, a doctor may recommend physical therapy or corticosteroid injections into the affected area.

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