Your rotator cuff is a group of four muscles and tendons that stabilize your shoulder joint and let you lift and rotate your arms. There are two kinds of rotator cuff tears. A partial tear is when the tendon that protects the top of your shoulder is frayed or damaged. The other is a complete tear.
Shoulder impingement syndrome is a common cause of shoulder pain. It occurs when there is impingement of tendons or bursa in the shoulder from bones of the shoulder. Overhead activity of the shoulder, especially repeated activity, is a risk factor for shoulder impingement syndrome.
A SLAP tear is a torn piece of cartilage in the inner portion of the shoulder joint. It can be painful and/or limit movement in the shoulder, especially overhead motions. The shoulder labrum is a ring of cartilage around the shoulder socket that stabilizes the head of the upper arm bone.