Femoral head necrosis, known as aseptic necrosis of the femoral head or ischemic necrosis of the femoral head, is a lesion caused by localized poor blood flow to the femoral head for a variety of reasons, resulting in further ischemia, necrosis of bone cells, fracture of bone trabeculae, and collapse of the femoral head. Since 1888, when the disease was first recognized by the world medical community, osteonecrosis of the femoral head has been transformed from an uncommon disease to a common and frequent disease. Especially since the introduction of hormones and their widespread use, the incidence of osteonecrosis of the femoral head has gradually increased. In addition, the increase in the number of accidents after the change of transportation and the change of people’s life style have made the number of patients with this disease increase dramatically. According to incomplete statistics, there are about 30 million people suffering from this disease worldwide, and about 4 million in China. The latest survey shows that there is no significant gender difference in the occurrence of this disease, and it can occur at any age, and the incidence of the disease is significantly increased in people with a history of hormone application, hip trauma, alcohol abuse, and related diseases. The disease can occur at any age but is most common between 31-60 years old, with no gender differences. It starts with vague or dull pain in the hip joint or its surrounding joints, which is aggravated by activities.