Joints with labral structures include the shoulder, hip and knee. 1. Shoulder:The labrum is an important structure that protects the shoulder joint, protects the articular cartilage, reduces friction, and slows down degeneration of the joint. Once torn, surgery is often required. 2. Hip joint: The labrum of the hip joint is located at the edge of the acetabulum, fully covering the femoral head, which can minimize hip impingement, reduce the friction coefficient of the hip joint, and ensure the function of the hip joint. Once torn, it can cause arthritis, necrosis of the femoral head and other diseases, and often requires surgical treatment. 3. Knee: The “labrum” structure of the knee is the meniscus, and the medial and lateral meniscus can reduce the friction of the knee, cushion the impact of the joint, and reduce the stress of the joint. Once torn, minimally invasive arthroscopic surgery is often required. The labrum is an important structure of the joint, and once abnormalities are detected, it is important to go to the hospital in a timely manner and under the guidance of a professional doctor, so as not to be negligent, so as not to delay the condition.