Golfer's elbow is a common term used for medial epicondylitis. Medial epicondylitis is clinically defined as pain at the medial epicondyle due to repetitive flexion and pronation at the elbow.
There is gradual onset of exercise induced pain around the medial epicondyle of the elbow that is aggravated by hyper-extension.
This is an over-use type injury of unknown etiology, often affecting the wrist flexor muscle origins at the medial epicondyle in racket sports players, javelin throwers and cricket bowlers. Despite the name, such injury to golfers is rare.
There is tenderness on palpation over the medial humerus epicondyle and pain and weakness is caused by resisted elbow hyper-extension.
Many sports can be maintained during healing but the duration of symptoms is usually long. Running, cycling and swimming are good alternatives to keep up general fitness. Gym training can be maintained.