Tennis elbow (Epicondylitis)
The elbow is where your upper arm bone meets the two lower bones in your arm. There is a bump on the inside of your elbow at the bottom of your upper arm bone. It is the medial epicondyle. A few tendons attach here. Tendons attach muscles to bone. These muscles are used to curl your wrist and fingers down. When these tendons get sore, swollen, and torn from overuse you have medial epicondylitis. It is also called golfer's elbow. This is a common problem in golf players. It may also happen with other activities or sports.