Golfer’s elbow, also known as medial epicondylosis, is an overuse injury caused by overloading and/or repetitive stress to the flexor tendon. The common flexor tendon attaches to the end of the humeral bone at the inside of the elbow and is formed by muscles that flex the wrist and run along the length of the forearm. The ulnar nerve is near this tendon, and if it becomes irritated, you may experience numbness or tingling along the inside of the forearm and into the ring and pinky fingers. Doing strengthening exercises and stretches can help to prevent this tendon microtrauma.