The rotator cuff is a group of four muscles and their associated tendons that stabilize the shoulder joint. These muscles, which include the supraspinatus, infraspinatus, teres minor, and subscapularis, work together to allow a wide range of shoulder movements, such as lifting and rotating the arm. Injuries to the rotator cuff are common, especially among athletes and individuals who perform repetitive overhead activities. Such injuries can lead to pain, weakness, and limited range of motion in the shoulder, making it difficult to perform everyday tasks. Treatment options may include physical therapy, medication, or surgery, depending on the severity of the injury.