It is commonly referred to as “dislocation” and is common among young people. Most of them have a history of shoulder impingement trauma, which is characterized by anterior dislocation of the shoulder joint, a feeling of emptiness in front of the shoulder joint, the affected hand cannot reach the opposite shoulder, pain in the affected shoulder, especially progressive pain at night that affects sleep, and weakness in abduction and supination. Many patients do not understand why they cannot lift the shoulder joint after a long time of rehabilitation. This is a combination of rotator cuff injury, commonly known as frozen shoulder, and includes many modern diagnoses: rotator cuff injury, impingement syndrome, calcific supraspinatus tendonitis, etc. How can shoulder dislocation be treated? First of all, we need to see an orthopedic surgeon to reset the shoulder in time. Secondly, nuclear magnetic examination to see if there is a combined tendon tear; if rotator cuff injury is diagnosed, conservative treatment such as oral fotarine, ultrashort wave physiotherapy, warm acupuncture, and external Chinese medicine can mostly relieve the symptoms but tendon repair must be done surgically. Minimally invasive shoulder arthroscopy repair is performed in time before there is a degenerative contracture of the supraspinatus muscle tear edge, which is more effective. There are also many methods of surgical shoulder arthroscopy to close the rotator cuff in time, which is less invasive and better to achieve biomechanical stability, making it ideal for patients with high aesthetic requirements. If there are 5-8 recurrent dislocations and a history of 5-10 years or more, shoulder arthroscopic tightening should be performed. Preventive measures: It is important to prevent impact on the shoulder joint, such as falling, and secondly, do not make sudden abduction or supination movements that can easily cause shoulder dislocation. After the first dislocation, make sure to fix it for 4-6 weeks before doing light or non-weight bearing activities. The most important thing to say about rehabilitation is that surgery only accounts for 1/3 of the treatment and rehabilitation accounts for 2/3. Before surgery, refer to the ASES (American Society of Shoulder and Elbow Surgery) score and after surgery, refer to the development of the most advanced rehabilitation training methods in Europe and the United States (rehabilitation in Belgium is also good), especially the late PRE (progressive muscle resistance exercises). Most of them can improve the function of the shoulder joint. However, the persistent, persistent pain for up to six months after surgery is still a worldwide problem.