Rotator cuff injury may include tendinitis, strain, or tear of the rotator cuff. The rotator cuff is made up of muscles and 4 separate tendons that fuse together to surround the shoulder joint.

Rotator Cuff Injury
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Causes of a rotator cuff injury include:

  • Direct blow to the shoulder area
  • Falling on an outstretched arm
  • Chronic degenerative wear and tear on the tendons:
    • Arthritis may decrease the space for the tendons
    • Chronic instability of the humerus may traumatize the tendons
  • Repetitive overhead motion of the arm such as in:
    • Swimming
    • Baseball (mainly pitching)
    • Tennis