Femoral head necrosis is an orthopedic disease, which is usually caused by osteonecrosis of the femoral head due to various causes of impaired blood supply. Femoral head necrosis is rated as one of the three most difficult orthopedic diseases by the world orthopedic medical community, which is difficult to treat and has a high disability rate. Once femoral head necrosis reaches an advanced stage, it will seriously affect the normal life and work of patients, causing the whole family to suffer from the shadow of the disease and fall into a painful situation. Early clinical symptoms of femoral head necrosis are not typical, and internal rotation of the hip joint leading to pain is the most common symptom. After the femoral head collapses, the range of motion of the hip joint may be limited. Signs:Local deep pressure pain, pressure pain at the stop of the internal rotator muscle, and axial percussion pain may be positive in some patients. Symptoms come and go, often disappear after rest, and it is difficult for inexperienced orthopedic surgeons to positively diagnose the segment, which is the reason for the high rate of misdiagnosis in the early stage of femoral head necrosis. Femoral head necrosis treatment requires early detection and timely treatment to avoid missing the best time for treatment.