When it comes to the knee meniscus, many people who work out and play sports are already familiar with the cartilage-like tissue in the knee joint that pads and protects the joint, and is the most easily damaged tissue in knee sports. But if there is a cartilage-like tissue in the shoulder joint that protects and stabilizes the joint, I’m afraid few people know about it. This cartilage-like tissue in the shoulder joint is called the “glenoid labrum”. The glenoid labrum is the main structure that maintains the stability of the shoulder during movement, which has been the most important part of human life and movement since the evolution of mankind. As the shoulder can move in a 360° range of motion, there are many opportunities for trauma, and the labrum is often the first tissue structure to suffer from shoulder injury. According to statistics, the number of people currently participating in fitness sports in China accounts for 30% of the domestic population, which is about 300 million people or more. The upper limb lift is the most vulnerable position for shoulder glenoid labrum injury in fitness sports, such as badminton, basketball, volleyball, swimming (freestyle), golf, single and double bar, javelin, shot put, gymnastics, aerobics, etc. In addition, the glenoid labrum of the shoulder is prone to injury in daily life such as pulling a hoop while riding the subway or in a small car, holding the upper limb high to dry clothes, falling and landing on the shoulder, or in a motorcycle or battery car accident. Another important reason for recognizing this glenoid labrum in the shoulder joint is that, due to the lack of knowledge about sports injuries in China, many patients with shoulder joint pain caused by “glenoid labrum” injuries are generally diagnosed as “frozen shoulder” and even treated with massage, shock waves, etc., resulting in aggravation of the condition. The result is that the condition worsens and the extent of the injury increases. Many patients receive proper treatment only a few months or even 1-2 years after the injury. This not only increases the patient’s pain, but also leaves the shoulder joint dysfunction in some cases. This problem has been taken seriously by the sports medicine community. In fact, when we treat shoulder joint lesions in our daily outpatient clinics, the rate of glenoid labral injuries is high in young and middle-aged people between the ages of 20 and 50, and most of the patients who fail to be clearly diagnosed in the early stages are also in this age group. Therefore, if a young person has a history of shoulder trauma and does not improve after more than 10 days of rest and symptomatic treatment, especially if the pain does not improve after physiotherapy or massage, or even worsens, consider the possibility of shoulder glenoid labrum injury, and seek consultation with a specialist in sports medicine (trauma) in a timely manner to avoid delay. Most of the shoulder glenoid labrum injuries can be cured by joint braking, rehabilitation therapy supplemented with certain analgesic and anti-inflammatory treatment and physiotherapy. Because the glenoid labrum of the shoulder joint, like the knee meniscus, has a poor blood supply and slow tissue healing, it often takes 4-6 weeks of treatment to heal. For those with large glenoid labrum injuries, especially if the injury is aggravated by inappropriate treatment, surgical suture repair is required. The minimally invasive arthroscopic surgical treatment adopted internationally in recent years is less invasive, less bleeding, and faster healing, which can effectively improve the treatment of glenoid labral injuries.