Rotator Cuff Injury

The arm is kept in the shoulder by the rotator cuff, a group of muscles that come together as tendon to cover the head of the humerus. The rotator cuff attaches the humerus to the shoulder blade and helps in lifting and rotating the arm.

The bursa, a lubricating sac between the rotator cuff and the bone on top of the shoulder, allows the rotator cuff tendons to glide freely when moving the arm.

When the rotator cuff tendons are damaged, bursa becomes inflamed and painful. When one or more these tendons are torn, they get detached the Humerus’s head. The damage starts with fraying of the torn tendons before progressing to complete tears.