The rotator cuff is a group of muscles and tendons that surround the shoulder joint, keeping the head of your upper arm bone firmly within the shallow socket of the shoulder. A rotator cuff injury can cause a dull ache in the shoulder, which often worsens when you try to sleep on the involved side.

The pain associated with a rotator cuff injury may:
Rotator cuff disease may be the result of either a substantial injury to the shoulder or to progressive degeneration or wear and tear of the tendon tissue. Repetitive overhead activity, heavy lifting over a prolonged period of time, and the development of bone spurs in the bones around the shoulder may irritate or damage the tendon.
The following factors may increase your risk of having a rotator cuff injury:
Conservative treatments — such as rest, ice and physical therapy — sometimes are all that's needed to recover from a rotator cuff injury. If your injury is severe and involves a complete tear of the muscle or tendon, you might need surgery.
If conservative treatments haven't reduced your pain, your doctor might recommend a steroid injection into your shoulder joint, especially if the pain is interfering with your sleep, daily activities or exercise. While such shots are often helpful, they should be used judiciously, as they can contribute to weakening of the tendon.
Physical therapy exercises can help restore flexibility and strength to your shoulder after a rotator cuff injury. Sometimes it is possible to eliminate pain and restore function without surgery.
Many different types of surgeries are available for rotator cuff injuries, including arthroscopic tendon repair, open tendon repair, bone spur removal, tendon transfer and shoulder replacement.
This article is for information only and should not be used for the diagnosis or treatment of medical conditions. Doctors Catalog has used all reasonable care in compiling the information but makes no warranty as to its accuracy. Consult a doctor or other health care professional for diagnosis and treatment of medical conditions. In the event of an emergency, please call 108 for immediate assistance.