Every Saturday, like clockwork, you hit the links for 18 holes. Nothing's more relaxing than a game of golf after a long week at work.

But then your elbow starts to ache. What is it? According to the Curtis National Hand Institute, it might just be golfer's elbow, the common term for medial epicondylitis. And that's an overuse injury that causes inflammation of the tendon fibers that attach the forearm muscles to the inside of the elbow. It can be painful to do simple things like pick up a cup.

Fortunately, it is treatable. If you feel pain, get to a doctor right away before it becomes chronic.