A 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 generally produces severe pain in the affected shoulder especially at night, often preventing sleep!
Rotator cuff injuries occur most often in people who repeatedly perform overhead motions in their jobs or sports. Examples include painters, carpenters, and people who play baseball or tennis. The risk of rotator cuff injury also increases with age and with certain diseases like diabetes & thyroid disorders.
Many people recover from a rotator cuff injury with physical therapy exercises that improve flexibility and strength of the muscles surrounding the shoulder joint. Severe rotator cuff injuries, involving complete tears of the muscle or tendon, may require surgical repair.
The pain associated with a rotator cuff injury may:
- Be described as a dull ache deep in the shoulder
- Disturb sleep, particularly if you lie on the affected shoulder
- Make it difficult to comb your hair or reach behind your back
- Be accompanied by arm weakness
Dr. Raju Easwaran, Senior Consultant, Max Super Speciality Hospital, Shalimar Bagh, mentions few causes of rotator cuff injuries like:
- 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. This applies especially to people doing shoulder pressures in gym using unusually heavy weights or improper techniques.
- Repetitive stress. Repetitive overhead movement of your arms can stress your rotator cuff muscles and tendons, causing inflammation and eventually tearing. This is the usual mechanism in racquet sports.
- 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. This generally happens with ageing.
The following factors may increase your risk of having a rotator cuff injury:
- Age. As you get older, your risk of a rotator cuff injury increases. Rotator cuff tears are most common in people older than 40.
- Certain sports. Athletes who regularly use repetitive arm motions, such as baseball pitchers, archers and tennis players, have a greater risk of having a rotator cuff injury.
- Construction jobs. Occupations such as carpentry or house painting require repetitive arm motions, often overhead, that can damage the rotator cuff over time.
Although resting your shoulder is necessary for your recovery, keeping your shoulder immobilized can cause the connective tissue enclosing the joint to become thickened and tight (frozen shoulder).
If you are at risk of rotator cuff injuries or if you've had a rotator cuff injury in the past, daily shoulder stretches and exercises can help prevent future injury.
Most people exercise the front muscles of the chest, shoulder and upper arm, but it is equally important to strengthen the muscles in the back of the shoulder and around the shoulder blade to optimize shoulder muscle balance. Your doctor or a physical therapist can help you plan an exercise routine. In extreme cases, you may require an arthroscopic cuff repair.