Often referred to as osteonecrosis refers to the collapse and necrosis of the femoral head in the elderly or obese population due to prolonged activity and increased loading or movement of the hip joint. Clinical x-rays can be taken to observe changes in the femoral head to confirm the diagnosis. Conventional non-steroidal anti-inflammatory drugs are no longer able to control the irreversible pathological changes as well as the pain of the patient, and surgical treatment is required. There are two types of surgical procedures commonly used in clinical practice. In milder cases, the head of the femur can be decompressed by drilling a hole in the femoral head to relieve the pressure in the femoral head, relieve poor blood circulation and promote bone growth and repair. If the lesion is more serious, artificial hip joint replacement surgery is needed, and the cost varies according to the artificial joint replaced, usually the unilateral joint is replaced, and the domestic joint is cheaper.