Femoral head necrosis is a disease in which the blood supply to the femoral head is interrupted or damaged, causing the death and subsequent repair of bone cells and bone marrow components, followed by structural changes in the femoral head and collapse of the femoral head, causing joint pain and joint dysfunction in patients, and is a common and difficult to treat disease in the field of orthopedics. It can be divided into two categories: traumatic and non-traumatic. The former is mainly caused by hip trauma such as femoral neck fracture and hip dislocation, while the latter is mainly caused by corticosteroid application, alcoholism, decompression sickness, sickle cell anemia and idiopathic in China. What are the people susceptible to femoral head necrosis? 1, long-term application of glucocorticosteroids patients long-term condition is not controlled or treatment efficacy, the need for long-term large amounts of glucocorticosteroids to control the condition is also the susceptible population of femoral head necrosis. 2, long-term heavy drinkers of alcohol poisoning caused by osteoporosis is also one of the causes of osteonecrosis of the femoral head. Friends with long-term heavy drinking habits, such as the two hip joints or hip pain, groin area, etc., and age 30 to 50 years old (drinking-induced necrosis of the head of the femur is the most common age group), must be careful, go to the hospital as soon as possible to do CT or MRI, you can see some of the subtle changes in bone quality. Femoral head necrosis has become clinically common and has become a frequent disease that affects people’s health and has a high disability rate. In recent years, the incidence of femoral head necrosis caused by alcoholism has been on the rise, and in some hospitals has accounted for 1/3 of all inpatients with femoral head necrosis, causing very serious harm. 3, people who have a history of hip trauma life, work, sports accidentally caused by the femoral neck fracture, hip dislocation or hip trauma without fracture dislocation can cause damage to the blood vessels supplying the head of the femur, laying a great hidden danger for future necrosis of the femoral head. Among them, femoral head necrosis is most common in femoral neck fractures, accounting for about 30% of such fractures. 4. Rheumatic diseases (SLE, rheumatoid, etc.) are a large group of diseases with different etiologies but common to the joints and surrounding soft tissues, including muscles, ligaments, bursae and fascia. In addition to pain, joint lesions are accompanied by swelling and impaired movement, and the chronic course of the disease alternates with remission, and some patients can have joint disability and visceral failure, making the bone loose, thus triggering bone changes, leading to femoral head necrosis. 5, other diving, flying personnel, obesity, hypertension, diabetes, atherosclerosis, gout, those who need to receive radiotherapy, after burns, hemoglobinopathies, etc., are also at high risk of femoral head necrosis.