This elbow injury has been found most commonly in people who play tennis, although it can be found in many patients who have never played tennis. This can be caused by acute trauma or by repetitive motion activities such as frequent keyboard use. Lateral Epicondylitis is associated with pain along the outside of the elbow with a specific area of tenderness. The cause of this pain is tearing of the extensor carpi radialis tendon at it attaches at the elbow (a forearm muscle which extends the wrist, attaches at the elbow, and tears at its point of attachment). This area can be treated with a number of different conservative approaches, although the most effective long term approach Dr. Kloth believes to be PRP injection. This treatment has been shown to have a greater than 90% long term response in recent studies. Surgery should be reserved for only the most recalcitrant cases.