Causes of rotator cuff injuries include:

  • Falling. Using your arm to break a fall or falling on your arm can bruise or tear a rotator cuff tendon or muscle.
  • Lifting or pulling. Lifting an object that's too heavy or doing so improperly — especially overhead — can strain or tear your tendons or muscles.
  • Repetitive stress. Repetitive overhead movement of your arms can stress your rotator cuff muscles and tendons, causing inflammation and eventually tearing.
  • Bone spurs. An overgrowth of bone can occur on a part of the shoulder blade that protrudes over the rotator cuff. This extra bone can irritate and damage the tendon.
Feb. 19, 2014