Femoral head necrosis, also known as ischemic necrosis of the femoral head, is a disease that causes ischemia and necrosis of bone cells in the femoral head for a variety of reasons, resulting in changes in bone structure and mechanical function, causing pain and dysfunction of the hip joint. The causes of femoral head necrosis are diverse, but the main and common ones are the following three major reasons: 1. Long-term use of hormones Hormonal femoral head necrosis is extremely common in the clinic, and there are some patients suffering from immune diseases, such as systemic lupus erythematosus, rheumatoid, dry syndrome, etc. In some cases, hormones must be applied to control the condition. However, there are some so-called “prescriptions” or “ancestral secret recipes” on the street that may contain hormones, so they can temporarily relieve the symptoms after use, but incorrect dosage and usage of hormones may lead to femoral head necrosis. Therefore, if you use hormones or hormone-containing drugs, you must apply them under the guidance of a doctor, and do not believe in the so-called “prescriptions” or “ancestral recipes”. 2, long-term alcohol abuse Femoral head in the human trunk and lower limb connection part, is a hub, where the innate blood supply is insufficient. Long-term heavy drinking will cause the femoral head to increase in fat cells and increase in size, making the pressure in the narrow space of the femoral head increase, and the blood supply will decrease. Therefore, for the sake of your health, it is advisable for alcoholics to quit drinking, and it is recommended that the total amount of liquor should not exceed 2 taels per day if there are difficulties. The most common injury is a fracture of the femoral neck. A fracture of the femoral neck can directly affect the local blood supply to the femoral head, leading to necrosis of the femoral head. Femoral head necrosis occurs in 1/3 of patients with a femoral neck fracture. Therefore, patients with femoral neck fracture must go to a regular hospital in time to avoid delaying the best time to reset the fracture.