As a result of a long history of hip diagnosis and treatment, I have accumulated some experience. Through communication with patients during outpatient clinics, I felt that many patients’ previous diagnosis was unclear. Since there are fewer medical personnel engaged in minimally invasive treatment in this area, we have diagnosed and treated many patients in this area through arthroscopy this year and obtained better results, and have some insights in diagnosis and treatment. I will do my best to diagnose and treat patients who have pain in this area but have not been diagnosed. Hip impingement syndrome (FAI) is a problem that has been discovered in the last decade or so and was thought to be common in Europe and the United States, but now it is not uncommon among the Chinese. The main cause is the defective development of the femoral head neck and acetabulum, which causes joint pain. The femoral head neck should be spherical on a lateral radiograph when it is normally developed, but the patient’s radiograph looks like a pistol grip (cam), or the anterior edge of the patient’s acetabulum is overdeveloped, causing the acetabulum and femoral head neck to impact when the patient exercises, which will cause pain, popping and interlocking over time. Patients have pain during deep squatting, rotation, or posterior extension of the hip. If the diagnosis is clear, arthroscopic molding of the neck of the femur and the anterior acetabular rim can be accomplished with suturing of the injured glenoid labrum. Patients with undiagnosed hip pain should be suspected of having this problem, which can be diagnosed and ruled out with appropriate testing.