1.There are many patients suffering from ischemic necrosis of the femoral head, how to detect it early? There are more patients with ischemic necrosis of the femoral head, and there is a gradual increase in the trend, new patients with ischemic necrosis of the femoral head in China are around 150-200,000 every year, therefore, early detection is very important. Early symptoms: Patients may feel pain in the groin or hip, and it radiates to the thighs. In this case, if the general medication is not effective, you should go to the hospital to take hip X-ray, CT, MRI and other examinations for early detection. 2, there are many ways to treat ischemic necrosis of the femoral head, how do we treat it and what is the effect? There are many methods to treat ischemic necrosis of the femoral head, which can be broadly divided into three categories: ( 1 ) non-surgical treatment. ( 2 ) Head preservation treatment. ( 3 ) Artificial joint replacement. Non-surgical treatment includes drug therapy, electrical stimulation, hyperbaric oxygen, avoiding weight bearing, etc. However, drug therapy is still in the exploration stage, and there is no drug with really reliable efficacy. When the femoral head collapses and the hip joint pain cannot be relieved by other methods, artificial joint replacement can be used. At present, for young people and patients with early lesions, we use a more reliable head-preserving treatment method, which is an anastomotic free fibula graft for ischemic necrosis of the femoral head, to preserve the function of the femoral head to the greatest extent possible and prevent or delay its collapse. Specifically, special instruments are used to remove the necrotic bone from the femoral head, cut a section of fibula in the middle of the calf, insert the fibula into the femoral head, anastomose the corresponding blood vessels, and play the role of support and re-osteogenesis, with an efficiency of more than 80% after long-term follow-up. 3, how to prevent ischemic necrosis of the femoral head? There are many causes of ischemic necrosis of the femoral head, but I think it is very important to avoid damage to the femoral head, rational application of hormones, reduction of alcohol intake and early detection of congenital hip dysplasia to prevent ischemic necrosis of the femoral head.