A shoulder sprain or strain involves an injury to the soft tissues of the shoulder. A shoulder sprain involves damage to the ligaments (the bands of tissue that connect bones together) and strains involve injuries to muscles and tendons. Injuries often happen during high-velocity or contact sports such as skiing, snowboarding, football, rugby and wrestling.
A shoulder injury usually occur around one or more of the joints that connect the four bones (the acromion, sternum, clavicle and scapula). A shoulder sprain or strain can be quite mild or at the other extreme can result in a complete tear.
Symptoms of shoulder sprains and strains may include
Reduced mobility of the shoulder
Pain when trying to move the shoulder
Swelling around the shoulder, tenderness, redness or bruising around the shoulder