Necrosis of the femoral head may be caused by trauma to the hip, glucocorticoids, prolonged and heavy drinking, and the combination of certain diseases, such as systemic lupus erythematosus and other diseases. 1. Hip trauma: most of them include hip joint dislocation and femoral head fracture. Dislocation and fracture will lead to the destruction of blood supply to the femoral head and cause blood loss, and prolonged insufficient blood supply may cause necrosis of the femoral head, and it usually takes several months for ischemic necrosis of the femoral head to show up. 2. Glucocorticoid stimulation: generally long-term use of methylprednisolone, prednisone, cortisone and other hormone drugs, many studies have shown that the use of glucocorticoid drugs for a long time and in large doses will lead to an increase in the risk of necrosis of the femoral head, as well as induced necrosis of the femoral head. 3. Long-term heavy drinking: Long-term heavy drinking may lead to abnormal lipid metabolism, which may affect the differentiation ability of bone marrow mesenchymal stem cells and cause femoral head necrosis. 4. Combination of certain diseases: anemia, antiphospholipid syndrome, systemic lupus erythematosus, decompression sickness, etc. may induce necrosis of the femoral head. There are many factors that induce necrosis of the femoral head, if you suffer from necrosis of the femoral head, you should consult the doctor in time to clarify the severity of necrosis of the femoral head, and target treatment.