Common Injuries of the Shoulder The shoulder is the most mobile joint in the body, but because of this flexibility, it is not very stable and is easily injured. Shoulder Dislocation The shoulder joint is the most frequently dislocated major joint of the body—often caused by a significant force that separates the shoulder joint's ball away from the joint's socket. Shoulder Tendonitis Shoulder tendonitis often occurs in sports that require the arm to move over the head repeatedly, such as in baseball, weight lifting, and racket sports. Rotator Cuff Injury An injury to the rotator cuff, such as a tear, may happen suddenly when falling on an outstretched hand or develop over time because of repetitive activities. Cubital Tunnel Syndrome Cubital tunnel syndrome feels similar to the pain that occurs from hitting the "funny" bone in your elbow. The condition may occur if you frequently bend your elbows, constantly lean on your elbows, or sustain a direct injury to the area. Lateral Epicondylitis (Tennis Elbow) The pain of tennis elbow is caused by damage to the tendons that bend the wrist backward away from the palm. Medial Epicondylitis (Golfer's and Baseball Elbow) Other activities that can cause this condition include carrying a heavy suitcase, chopping wood, and using a chainsaw. Burners and Stingers Syndrome in Young Athletes Burners and stingers syndrome is usually caused by an injury during practice or competition. The most typical injury occurs when a youngster falls or takes a blow to the neck or shoulder.