Femoral head necrosis is a pathological evolutionary process that initially occurs in the weight-bearing area of the femoral head, with damage to the trabecular structures of the necrotic bone under stress, i.e., microfracture and subsequent repair process for the damaged bone tissue. The causes of osteonecrosis are not eliminated, the repair is not perfected, and the process of injury-repair continues, leading to structural changes in the femoral head, femoral head collapse, deformation, joint inflammation, and functional impairment. With limited lesions of femoral head necrosis, painful symptoms can be reduced by treatment in the early stages, and even if the function is severely limited, it can still be remedied by artificial hip replacement in the end, and walking ability can still be restored.