The shoulder joint is the joint with the largest range of motion in the body and is the basis of upper extremity movement. Because the shoulder joint has a small glenoid, a large and round humeral head, and a loose joint capsule, the glenohumeral joint, unlike other joints, has a large range of motion. The range of motion is even greater when the scapula is lifted, rotated and moved around the chest wall (adduction and abduction). As a result, the shoulder joint can perform complex and wide range of motion during sports; such as hoop, bar, backstroke, butterfly and throwing shoulder movements. Because of this, it is more prone to injury. The anatomical structure of the shoulder joint is characterized by a “high degree of mobility”, so it is easy to dislocate. According to general trauma statistics, the incidence of shoulder dislocation accounts for about 50% of all joint dislocations in the body, of which 95% are anterior dislocations, 50% to 70% occur before the age of 30, and 80% to 95% of recurrent dislocations occur after adolescent dislocations. Properly handled, it can be reduced to 25%~35%. During sports, whenever the shoulder joint is in upper arm abduction and the hand or elbow is on the ground during a fall, anterior dislocation of the shoulder joint may occur, which causes the humeral head to move below the scapular pelvis and puts the lower part of the joint capsule in a state of tension and traction. This is characterized by pain and joint movement disorder in the front of the shoulder joint; the shoulder loses its normal contour and becomes a “square shoulder”, the joint pelvis is empty, and the humeral head can be palpated outside the joint pelvis; the shoulder hitch test is positive, i.e., when the palm of the affected hand is placed on the healthy shoulder, the elbow on the affected side cannot press against the chest wall. Dislocation of the humeral head to the posterior side of the scapular glenoid due to trauma is called posterior dislocation and is rare clinically. The general treatment for acute anterior shoulder dislocation is manual repositioning and bandage or triangular scarf fixation. The duration of fixation varies according to the injury and age of the shoulder joint, and is generally fixed for 3 weeks. In the elderly, medical sports exercises should be performed a few days after the injury. Exercise can generally be resumed after 2 months. For the best athletes, surgery to repair the damaged structures in the joint can be considered immediately after the injury. A very small number of patients with acute anterior shoulder dislocation also require surgical treatment with incisional repositioning or glenoid labral repair. Recurrent dislocation of the shoulder joint, most often seen in athletes in volleyball, wrestling and gymnastics, has the same mechanism of injury as acute shoulder dislocation, but the pathology of the injury is not identical. In recurrent dislocation of the shoulder, there is usually a tear of the anterior glenoid labrum of the scapular glenoid (Bankart injury) or a compression deformation of the external posterior aspect of the humeral head (Hill-Sachs injury) resulting in frequent dislocation of the joint due to instability. Recurrent dislocation of the shoulder is diagnosed if the patient has a history of two or more dislocations, a positive shoulder dislocation fear test, and a radiograph of the dislocation. For recurrent shoulder dislocation, surgical treatment is mostly used, and appropriate rehabilitation exercises are given after surgery. There are two types of surgical treatment: incisional surgery and shoulder arthroscopic surgery. Currently, techniques such as shoulder arthroscopic glenoid labrum repair surgery are gradually increasing in level and are widely used. In more severe cases, the shoulder joint can become dislocated in daily life, such as when stretching and turning over in sleep. At this point, it can be diagnosed as habitual dislocation of the shoulder joint, and only surgical treatment can solve it.