Xiao Chen is a freshman, love to play basketball, a jump up after an accidental fall, right hand support the ground, when the shoulder pain did not leave much impression on Xiao Chen. What I didn’t expect was that the nightmare would follow Xiao Chen from then on, causing Xiao Chen’s sports career to almost come to a close. The injury was thought to be a simple muscle strain, Chen did not care, rested for a week, but still no signs of improvement, and the right arm can not be lifted, even the basic washing, combing hair can not be completed, the pain is very much. So, Xiao Chen has been bouncing around hospitals at all levels since then, taking films without fractures, diagnosing “frozen shoulder”, stopping the pain and encouraging him to strengthen his exercise. 2 months have passed, but the symptoms have not only not improved, but are getting worse, so Xiao Chen panicked …… when anxious. After a brief history and physical examination, he was considered to have a “glenoid labral injury” and had an MRI to confirm the diagnosis. In the past, shoulder pain was often diagnosed as “frozen shoulder”, even in some tertiary hospitals, which caused great pain to patients with sports injuries like Xiao Chen. Shoulder sports injuries such as “rotator cuff injury”, “glenoid labrum injury”, “shoulder instability” and other diseases are all missed and not given enough attention, resulting in such injuries. Patients’ symptoms deteriorate under incorrect functional exercises. Rotator cuff injuries alone account for 40% of shoulder disorders, and among younger patients who love sports, this percentage even reaches 60%. Because of the difference in treatment with frozen shoulder, the secondary damage to rotator cuff tissues and the psychological trauma caused by misdiagnosis are incalculable. With so many sports injuries, the most common, up-to-date and effective way to treat them, with the exception of a few that can be treated conservatively, is arthroscopy. Shoulder arthroscopy is a minimally invasive procedure that allows direct visualization of some lesions inside the shoulder joint and under the shoulder crest to make a clear diagnosis, which makes up for the shortcomings of traditional X-rays, CT and MRI, and can be performed under the microscope or guide the choice of incisional surgery method. It has become the best treatment method for many shoulder diseases such as shoulder labral tears, rotator cuff disease and shoulder instability. If we look at periacetabular injuries and choose the right treatment plan, we will be able to eliminate the “invisible killer” of the shoulder joint!