The shoulder joint is the most mobile joint in the human body and can meet the needs of daily life and special sports, but it is also the joint most prone to dislocation in the human body, with a surprisingly high incidence of 45%-50% of all joint dislocations. Shoulder dislocation is a common and frequent disease in orthopedics, and it used to be thought that the treatment of traumatic initial shoulder dislocation was very simple, requiring only manual repositioning and triangular scarf fixation for a few weeks. However, follow-up studies have revealed that this is not the case! Many patients will frequently dislocate at a specific location of the shoulder joint after such treatment, such as when fishing and shaking a fishing rod, when shooting and volleyball snapping, or when hand pulling a lever and encountering a bus emergency brake. Even dislocation of the shoulder joint can occur after minor trauma, and the frequency of occurrence increases, seriously affecting the function of the affected limb and reducing the patient’s quality of life. Many patients also have a fear of dislocation and are afraid to exercise or to raise their hands above their heads, which poses a serious challenge to the treatment of traditional shoulder dislocation. Why does the initial dislocation of the shoulder joint become a “habit” after trauma? To address this question, we should start with the anatomy of the shoulder joint. Simply put, the shoulder joint consists of the humeral head and the scapular glenoid, which is a multi-axis ball and socket joint with a large humeral head and shallow scapular fossa. The peripheral joint capsule is weakly restricted, making it the most mobile and flexible joint in the body. Because the shoulder joint lacks strong enough protection and is easily affected by external forces, it is susceptible to dislocation; secondly, there are various forms of shoulder dislocation, including partial dislocation and complete dislocation of the shoulder joint; there are also anterior dislocation, posterior dislocation and multidirectional dislocation; when the shoulder joint can be repeatedly dislocated under slight external forces and can mostly be reset by itself, it is called habitual dislocation of the shoulder joint. It can be seen that shoulder dislocation is not simple, but in fact very complicated. In addition, whether or not the shoulder joint dislocates again after dislocation is also closely related to the age at which the dislocation first occurred. According to the literature, the proportion of patients younger than 30 years old who had a dislocation of the shoulder joint within 2 years after the initial dislocation exceeded 50%, and some even exceeded 95%, which did not correlate significantly with whether the shoulder joint was fixed after the dislocation was reset. The traditional treatment of initial shoulder dislocation after trauma is based on manual repositioning and triangular scarf fixation, which is too single treatment method, while shoulder dislocation is complex and diverse with many influencing factors. What are the dangers of shoulder dislocation when it becomes a “habit”? Non-surgical treatment is often ineffective in many young, athletic patients, and it is very easy to re-dislocate the shoulder, even becoming a “habit”. Such a “habit” can easily cause further damage to the shoulder capsule ligaments, resulting in damage to the humeral head and glenoid bone, damage to the articular cartilage, biceps tendon and rotator cuff, and even nerve damage, which can seriously hinder the function of the shoulder joint, affect the patient’s quality of life, and even lead to psychological disorders. Shoulder dislocation becomes a “habit” and not only does it seriously affect the function of the shoulder joint, but it also makes treatment more complicated and difficult, and in severe cases, the only way to treat it is to regret receiving artificial joint treatment. Therefore, the International Academy of Sports Medicine and Shoulder Specialists recommend that patients who suffer a first dislocation of the shoulder joint due to trauma before the age of 30 should have early surgery to repair the torn shoulder capsule ligaments and glenoid labrum in order to effectively prevent such a “habit” from occurring. In order to reduce the occurrence of shoulder dislocation as a “habit”, it is advisable to adopt different treatment methods after traumatic shoulder dislocation according to the specific situation. In many patients, the initial dislocation can be repaired under shoulder arthroscopy after damaging the capsular ligaments and glenoid labrum, which is not only minimally invasive but also effective. However, if we wait until the shoulder joint has a large bone defect, articular cartilage damage, and an all-around laxity of the capsular ligament before performing arthroscopic shoulder repair, the results will be much worse than those of early patients, and the recurrence rate will be greatly increased. Therefore, patients with traumatic shoulder dislocation should not take it lightly and should go to a specialist hospital for examination and treatment; at the same time, we orthopedic surgeons should keep up with the new concept of international treatment of shoulder dislocation and treat it differently according to different cases. Only with scientific analysis and correct treatment can we reduce or even stop the initial shoulder dislocation from becoming a bad “habit”.