Rotator cuff tears are a common cause of shoulder pain and dysfunction. Common symptoms include shoulder pain, weakness and limited movement. The rotator cuff, also known as the tendon cuff, is composed of the tendons of four muscles: the inferior turbinate, supraspinatus, infraspinatus and teres minor. Most cases are caused by degenerative changes in this tendon followed by a mild sprain, strain, or contusion resulting in a rupture, while individual cases are caused by more severe trauma, such as a sprain or dislocation of the shoulder joint. The site of the tear is mostly 1.25 cm above the greater tuberosity of the humerus, and the degree of the tear can be partial or complete. Complete tears are painful at the time of injury, then lighter, and then progressively worse, with the shoulder joint unable to move and the affected limb protected by tendon limb support. The main symptom of partial tears is shoulder pain. On examination, there are positive Neer impingement sign, positive pressure pain on the anterior and lateral edges of the shoulder peak, positive pain arc sign at 60°-120°, and positive Jobe test. Treatment varies according to age and tear size. Adolescent patients and those with larger tears should have early surgical repair and early activity; for those who are older and have smaller tears, their treatment is mainly symptomatic, including rest, ice, physical therapy, oral non-steroidal anti-inflammatory pain medication, local closure and muscle strengthening training. Rotator cuff suture repair includes incisional surgery and arthroscopic surgery. With the advancement of arthroscopic technology, total arthroscopic rotator cuff suture repair surgery is becoming more and more common, and it has the advantages of less trauma and faster recovery. Among the conservative treatments, closure therapy has a certain role in reducing pain and helping patients to move their shoulders, and some older ones who are afraid of surgery can consider using it first. However, there is often a reaction on the second day of injection and the pain is aggravated. This reaction can disappear within a few days and the symptoms can be gradually reduced. Occlusion therapy can only be used occasionally. Long-term and repeated occlusion therapy can lead to degeneration of the tendon.