Rotator cuff tears make up a common source of pain and injuries among adults. Nearly 2 million Americans visit their doctors due to a rotator cuff injury every year.

A torn rotator cuff will cause the shoulder muscles to weaken. This means that patients may have difficulties performing routine daily activities that involve lifting the arms, such as combing hair or putting on clothes. 

The rotator cuff holds the arm in the shoulder socket.  The rotator cuff consists of four different muscles that come together and attach their tendons to form a capsule covering around the head of the humerus, or arm bone. The rotator cuff holds the humerus to the shoulder blade and assists in lifting and rotating the arm.