In everyday life, if there is shoulder pain or dysfunction, the first thing that comes to mind is “frozen shoulder”. In fact, the medical term for frozen shoulder is “frozen shoulder”, which is called “adhesive capsulitis”. The difference between frozen shoulder and rotator cuff injury is that: 1) pain and limited activity are the main symptoms, while the symptoms of weakness are not obvious; 2) active and passive activities of the shoulder joint and arm are limited in all directions, unlike rotator cuff injury which is mainly active abduction and external rotation; 3) the course of the disease is self-limiting, which means that it often heals itself after a period of time (six months to a year). The incidence of “frozen shoulder” is not high, only about 2%, while the incidence of rotator cuff injury is the highest among shoulder joint diseases. Studies have found that the incidence of rotator cuff injuries increases significantly with age, with a 4% incidence in people under 40 years of age, 28% in people between 40 and 60 years of age, and 54% in people over 60 years of age. Several scientific studies have proven that there is a nearly 60% chance that rotator cuff tears are responsible for shoulder pain symptoms in people over the age of 60. This is mainly due to the misunderstanding of rotator cuff injury in the domestic medical community, which put it in the category of “frozen shoulder” and treated it conservatively, resulting in rotator cuff injury becoming a more underdiagnosed and misdiagnosed disease. Unfortunately, these patients who are misdiagnosed with “frozen shoulder” also follow the rehabilitation exercises for frozen shoulder, such as “wall climbing”, or artificially forcing the shoulder joint to release under the guidance of the doctor. These rehabilitative measures can cause the rotator cuff rupture to continue to expand and aggravate the injury, leading to different degrees of muscle atrophy and stiffness of the shoulder joint, and long-term pain can also lead to depression and neurasthenia. Once a huge irreparable rotator cuff tear is formed, it can lead to disability of the affected limb, osteoarthritis of the shoulder joint, and many patients eventually have to undergo artificial joint replacement to relieve their condition. ”Early diagnosis and intervention is particularly important in the case of rotator cuff tears, especially in middle-aged and older people over 40 years of age, or in younger people who experience shoulder pain after trauma, especially if the pain is worse when the hand is raised over the head, accompanied by a feeling of weakness. Mild rotator cuff injuries can be slowed down by physiotherapy, functional exercise, medication and other conservative treatments, but torn rotator cuff tissues generally cannot heal. In contrast, patients with obvious symptoms of large or massive tears, full-layer tears caused by trauma, and those who have not been able to heal after 3 months of conservative treatment should undergo early arthroscopic minimally invasive treatment to sew the torn rotator cuff back onto the bone in order to heal the rotator cuff. After the surgery and then systematic rehabilitation, patients can mostly recover their functions.