The labrum is tough, resilient fibrocartilage that deepens the socket to help stabilize the shoulder, and connects to important structures involved in the motion of the shoulder-namely, the shoulder capsule. Because the labrum performs important roles in stabilizing the shoulder, and provides important connections in limiting excessive motion, a tear in the labrum can cause persistent pain. This leads to the muscles tightening up and limiting motion, as well as symptoms of looseness, which discourages the patient from using their full range-of-motion and participating in their normal activities.