Rotator cuff tear is a phenomenon in which the muscles that rotate the shoulder joint are partially or completely torn. This is one of the common causes of shoulder pain, severe pain in the shoulder joint and pain increases when moving the arm or when sleeping on the side of the injured shoulder. Rotator cuff tears often occur in people over 40 years old, workers who have to do a lot of activities or athletes who have to perform repetitive movements (javelin throw, volleyball, basketball, swimming, ...)