<prompt> ;Tennis elbow, is characterized by -Tenderness over the medial epicondyleTendinitis of common extensor originTendinitis of common flexor originPainful flexion and extension  <response>: Tennis elbow is also known as lateral epicondylitis . It is a condition characterised by pain and tenderness at the lateral epicondyle of the humerus due to non specific inflammation at the origin of the extensor muscles of forearm. Although it is sometimes seen in tennis players, other activities such as squeezing clothes, carrying suitcase etc. are frequently responsible Reference-Essential ohopaedics- Maheshwari-5th edn-pg no 302 