What is Golfer’s Elbow (Medial Epicondylitis)? What is Tennis Elbow (Lateral Epicondylitis)? We can discuss both Tennis and Golfer’s Elbow as both conditions affect the elbow. The differences amount to whether the condition affects the outer part of the elbow (Tennis Elbow or Lateral Epicondylitis) or Inner part of the elbow (Golfer’s Elbow or Medial Epicondylitis). Lateral Epincondylitis is the outer elbow tendons are inflamed. Medial Epicondylitis is the inner elbow tendons that are inflamed. These injuries/conditions tend to be quite common and occur mostly because of overuse. These tendons are bands of tough tissue that connect the muscles of…