First, medicine is an important killer of necrosis of the femoral head. At present, some diseases can be treated with medicine with good results, but the side effects are large. The hormone in the medicine will cause harm to the body, even lead to necrosis of the femoral head. The occurrence of necrosis of the femoral head is directly related to the type, dosage form and administration way of the hormone. Second: osteoporosis, deficiency of liver and kidney and other diseases gradually induced necrosis of the femoral head. The clinical manifestations of osteoporosis are weakness, pain, weight-bearing and fracture. Deficiency of liver and kidney is manifested by emaciation, sallow, impotence, premature ejaculation, dreaminess, spermatorrhea, asthenia, etc.
Second: osteoporosis, deficiency of liver and kidney and other diseases gradually induced necrosis of the femoral head. The clinical manifestations of osteoporosis are weakness, pain, weight-bearing and fracture.
Third: alcohol and trauma lead to necrosis of the femoral head. According to clinical data, people who drink for a long time are several times more likely to suffer from necrosis of the femoral head than those who don't drink, because the accumulation of alcohol in the body will lead to the increase of blood lipid and damage of liver function. The increase of blood lipid results in the increase of blood viscosity, the slow down of blood flow and the change of blood coagulation, which can block blood vessels, cause bleeding or fat embolism, and cause osteonecrosis. Such as femoral neck fracture, hip joint dislocation, hip joint sprain and contusion caused by external force impact. Trauma is the main cause of necrosis of the femoral head.