The most overlooked condition in patients with hip pain is hip impingement syndrome. The concept of femoroacetabular impingement syndrome (FAI) was introduced by Ganz et al. in 2003. Hip impingement syndrome is a group of hip syndromes caused by dysplasia, femoral head necrosis, femoral head slipping, acetabular socket, trauma, surgical overcorrection, and other reasons. It is mainly manifested as intermittent or persistent inguinal pain in adolescents and middle-aged patients, which is induced or aggravated by hip flexion movements such as squatting, stooping, lifting legs, and climbing, accompanied by limitation of hip joint activities. Some patients showed hip weakness, tenderness, and pseudo-interlocking. This disease can lead to damage to the labrum and cartilage in the corresponding part of the hip joint, and develop into osteoarthritis in the late stage. Fu Zhihou, Department of Orthopedic Diseases, Jinan Military General Hospital Hip impingement caused by acetabular overcoverage is known as pincer impingement. Its main factor is overcoverage, such as acetabular retroversion, acetabular invagination, acetabular protrusion and so on. Acetabular dysplasia, slipped capital femoral epiphysis, trauma, and surgical overcorrection can lead to acetabular retroversion. Hip impingement caused by lateral femoral neck augmentation is known as cam-type impingement. The main factor is the lack of eccentricity of the femoral head-neck junction, such as femoral head unrounding and aplasia of the head-neck junction area. Hyperplasia of the head-neck junction region caused by necrosis of the femoral head, slipped epiphysis of the femoral head, and flattened hips allows impingement of the head-neck junction against the upper outer rim of the acetabulum when the hip is flexed and internally rotated at the same time. The diagnosis of hip impingement sign is mainly based on symptoms, signs and auxiliary examination, and the impingement sign can be seen on physical examination, and the “4” test is positive. In the orthopantomogram, the “cross sign” of the anterior and posterior acetabular margins is shown, which is a pincer-type impingement. In X-ray film, the bones at the outer edge of the head and neck junction area are full, protruding, cystic changes, etc., which is cam-type impingement.CT and MRI can also make a clear diagnosis. Diagnosis and treatment methods, mild cases can be treated conservatively, and those with poor results often require surgical treatment, with the help of minimally invasive surgical techniques such as hip arthroscopy, a breakthrough in treatment can be realized. Specialized tools are introduced into the joint cavity through 2-3 5 mm incisions. Since the surgery is performed on a TV screen, the surgeon is able to effectively clean out the hip joint cavity, remove the impingement-causing bony residue, repair the damaged labrum, and promote the repair of the damaged articular cartilage, among other surgical steps. The surgery is minimally invasive, and patients recover quickly after the surgery, usually without affecting their self-care.