
The rotator cuff is comprised of the tendons and the muscles that surround the shoulder joint It holds the head of the upper arm bone firmly in the socket of the shoulder An injury to the rotator cuff can lead to a dull ache in the shoulder The ache can get worse when you sleep on the affected side Rotator cuff injuries are common among people who have to perform repeated overhead motions in sports or jobs For instance, carpenters, painters, tennis players, and basketball players are at high