Can occur acute due to overstrain and can sometimes develop to a chronic condition of pain.
The problem is located at a spot on the lateral side of the elbow where those muscles that extend the wrist and fingers originate. This is a common complaint among craftsmen and office employees. Also occurs in sports e.g. golf, tennis and badminton.

Repetitive unilateral/static work of the hand and forearm.
Not adjusted place of work or equipment (grip and racket size).

Symptoms
Pain on the outside of the elbow.
Lack of strength.
Palpation pain on the lateral side of the elbow.
The trouble is aggravated by brushing teeth, writing, lifting and computer work.

Treatment
Eccentric training with straight or bent elbow.
Stretching.
Elbow strap.
Adjust working place and equipment.
Avoid elements that aggravate the symptoms.