&;Tennis elbow&; is characterized by
Tenderness over the medial epicondyle
Tendinitis of common extensor origin
Tendonitis of common flexer origin
Painful flexion and extension
.tennis elbow(lateral epicondylitis) characterised by pain and tenderness at the lateral epicondyle of the humerus due to non-specific inflammation of the origin of extensor muscle of the forearm. clinical features-tenderness ,precisely localized to the lateral epicondyle of the humerus.pain is aggravated by putting the extensor tendons to a stretch (Ref: Essential ohopaedics, Maheshwari and Mhaskar,5th edition,pg no. 302)
Trauma