γγI was fortunate enough to visit the joint surgery center of mayo clinic in minisota, USA, to learn more about the origin of hip impingement syndrome and the current treatment progress in this center.γγIn 2003, Ganz et al. introduced the concept of femoroacetabular impingement syndrome (FAI). Hip impingement syndrome is a group of hip syndromes caused by dysplasia, femoral head necrosis, femoral head slippage, acetabular impingement, trauma, surgical overcorrection and other causes. It mainly presents as intermittent or persistent pain in the groin area in adolescent and middle-aged patients, which is induced or aggravated during hip flexion movements such as squatting, bending, leg lifting and climbing, with limited hip movement. Some patients present with hip weakness, playing softness, and pseudo-interlocking. The disorder can lead to glenoid labral injury and cartilage damage in the corresponding parts of the hip joint, and develop into osteonecrosis in the late stage.