Causes of tennis elbow

The tennis elbow is a colloquial name that has been called the “external epicondylitis of the arm” condition. This name is wrong because the lesion comes from the tendon tissue. Tendon tissue is inserted into the external “epicondyle” of the humerus bone (soft tissues): tendinitis and tenosynovitis. In short, the tendon that covers it is the affected one.

Instead, there can also be an injury to the tissue that covers the bone: periostitis. The muscles I call below come together in a common tendon, which is inserted into the epicondyle of the humerus, which can rupture the periosteum and cause injury. painful.

Muscles belonging to the extensor tendons of the forearm: short radial, extensor digitorum, extensor digiti minimi, ulnar extensor brevis, and short supinator.


Its symptoms are manifested by pain, then amplified by the extension movement of the forearm, in the pronation of the forearm, in any outward movement. In some cases, it can be quite painful when it touches the outer epicondyle of the humerus. It generates functional impotence in work and sports activities. If the injury is very acute or severe, it can prevent any movement of the arm.

     The causes of tennis elbow are the following:

  • This problem is most common in tennis players because this sport benefits from back blows. Being this movement in which these muscles are the most forced, producing tears of tendon or periosteal bone fibers.
  • In some cases, this problem still occurs due to the overload of the extensor muscles, without actually being a tissue injury, but the muscle fibers contract, giving similar symptoms.
  • And last but not least, it can be caused by blows, falls, or physiological damage. These circumstances can also cause pain in this region.