In recent years, there has been a quantum leap in the international understanding of hip pain, with major revisions to the guidelines for the management of hip pain that have been common in the past. Hip pain is not always a result of necrosis of the femoral head and degeneration of the joint, but is also very much a new problem — hip impingement It is now believed that hip impingement can manifest itself in two ways, as a problem above the hip joint and as a problem with the femoral head of the hip, each of which is described below: Impingement can occur in the bony bones of both the femoral head neck and the acetabular rim, and the bony impingement that occurs at the neck of the femoral head, is referred to as a CAM ( cam-type) impingement, whereas the bony impingement that occurs at the acetabular rim is called a PINCER (pinch-type) impingement. Pincer type femoroacetabular impingement: It is a syndrome in which the anterior over-coverage of the acetabulum or the posterior tilt of the acetabulum causes the bone-neck union and the acetabular rim to be repeatedly impinged when the hip is flexed, resulting in a “pincer” injury, which ultimately leads to glenoid labrum and articular cartilage injuries. Clinical symptoms mainly manifest as pain in the groin area. Physical examination: positive anterior impingement test, X-ray examination: positive phase overlap sign, posterior wall sign, or other evidence of overcoverage of the acetabular rim. Hip arthroscopy is a favorable treatment for pincer-type femoroacetabular impingement sign, with less trauma, faster recovery, and better outcome. CAM (cam-type) femoroacetabular impingement: this is due to a difference in the morphological match between the femoral head and the acetabulum, which results in an injury to the hip joint during motion. This injury is often progressive and cumulative. Although the lesion is primarily due to developmental factors, symptoms do not appear in childhood. Once symptoms do appear, they are often progressive and difficult to heal or recur, mainly due to the obvious damage caused by prolonged impingement.