Medial epicondylitis (golfer’s elbow) is a type of tendinitis that affects the inside of the elbow. It develops where tendons in the forearm muscle connect to the bony part on the inside of the elbow.Tendons attach muscles to bones. Due to injury or irritation, they can become swollen and painful. Although medial epicondylitis is referred to as golfer’s elbow, it doesn’t only affect golfers. It can occur from any activity involving use of the arms or wrists, including tennis and baseball. Medial epicondylitis is caused by repetitive motions, which is why this condition occurs among athletes. Golfers may develop this type of tendinitis from repeatedly swinging a golf club, whereas tennis players can develop it from repeatedly using their arms to swing a tennis racket. In both cases, overuse of the arms and wrist damages tendons and triggers pain, stiffness, and weakness.Other risk factors for this type of tendinitis include playing baseball or softball, rowing, and weightlifting. Activities like playing an instrument and typing on the computer can also lead to medial epicondylitis