The term “frozen shoulder” is so popular that middle-aged and elderly patients tend to attribute their shoulder joint problems to frozen shoulder, thus delaying treatment. In fact, frozen shoulder only accounts for 10%-15% of shoulder pain patients. Today we are going to introduce rotator cuff injury. Rotator Cuff Injury The rotator cuff refers to the supraspinatus, infraspinatus, teres minor and subscapularis muscles, which play a very important role in the function and stability of the shoulder. Rotator cuff injuries are common in older adults over 60 years of age, and the prevalence increases with age. Lifting and pulling heavy objects, falling, etc. are often the causes of rotator cuff injuries in older adults. The causes of rotator cuff injuries can be divided into traumatic and non-traumatic. Non-traumatic rotator cuff injuries can be caused by age, wear and tear, or blood supply factors, and subacromial impingement is a common cause of rotator cuff degeneration and tear. The main manifestation of rotator cuff injury is pain in the shoulder joint with weakness in lifting, and the pain is significantly worse at night in the lateral recumbent position. The pain is distributed in the front of the shoulder joint and the deltoid area, and the abduction and supination of the shoulder joint on the affected side is difficult. When superficial rotator cuff injury does not involve the main part of the tendon and has no obvious effect on movement, most of the treatment attempts are non-surgical comprehensive treatment. If the comprehensive non-surgical treatment still cannot basically restore the abduction of the shoulder joint, then surgical treatment is necessary. Currently, the mainstay of surgical treatment is rotator cuff repair under shoulder arthroscopy. When you experience similar shoulder discomfort, do not believe in “prescriptions” or “experience”, but go to a regular hospital and consult a specialist.