It is easy to understand how easy it is to strain the lower back, but there is less awareness of strain on the shoulder joint. There is an important functional structure in the shoulder joint called the rotator cuff, which is a group of four tendons that are subjected to a lot of stress and tend to wear out with age, or even tear without trauma, resulting in shoulder pain, limited movement, significant nighttime pain, difficulty dressing, and in the long run, complications of frozen shoulder, which can seriously affect quality of life. Many cases of frozen shoulder are secondary to rotator cuff tears, which can be avoided by early diagnosis and treatment of rotator cuff tears. At present, domestic shoulder surgery has just started, many patients, family members and even professionals do not have enough knowledge, and simply think of “frozen shoulder”, which is likely to delay the disease.