Femoral head necrosis is a multi-infarct and common disease, which is a type of disease caused by various causes of blood circulation disorders in the femoral head, resulting in ischemic necrosis of the femoral head. At present, there are about 30 million people suffering from this disease worldwide, and about 4 million people in China every year. Femoral head necrosis is not easy to treat and has a high disability rate, so it is not surprising to talk about femoral head necrosis. The latest survey shows that there is no significant gender difference in the occurrence of the disease, and the disease can occur at any age, and the chance of developing the disease is significantly higher in people with a history of hormone application, hip trauma, alcohol abuse, and related diseases. Further development can lead to dysfunction of the hip joint, seriously affecting the patient’s quality of life and ability to work. Once the patient puts weight on the hip joint or even steps on the ground normally, collapse of the femoral head is likely to occur. If the treatment is not timely, it can lead to lifelong disability. According to the usual Ficat staging, there are five levels from 0 to IV. Generally, it is difficult to reverse femoral head necrosis in stage III-IV, and patients in stage IV basically need artificial joint replacement surgery. The fear of any disease is not to be afraid, but to be unable to prevent and control it, and to be unable to diagnose and treat it early. There are many modern treatments for head preservation, such as drilling and decompression, iliac bone block with vascular tip and autologous cancellous bone transplantation, stem cell transplantation and Chinese herbal medicine, but regular treatment must be carried out. Even if a stage IV patient needs artificial joint replacement surgery, the longevity of the joint and long-term results must be considered. If the hip joint or its surroundings have hidden pain, dull pain and limited activities, you should go to a regular hospital in time to avoid delaying the disease. The prevention of femoral head necrosis focuses on prevention, to prevent it, we need to know what factors can cause femoral head necrosis, which is caused by long-term application of hormones, hip fracture dislocation, long-term heavy drinking and rheumatoid arthritis, as well as some congenital developmental defects. For the above reasons, we suggest the following aspects of prevention: 1, try not to use hormone drugs in daily life, unless necessary, under the guidance of a professional doctor to use drugs strictly. 2.After hip fracture dislocation, go to hospital for regular review and have a specialist to guide weight bearing and functional exercises. 3.Improve the concept of health, advocate the new etiquette of interaction, drink healthy alcohol and avoid drinking bad and fake alcohol. 4, hip pain discomfort as far as possible away from the damp, cold, wet places, hiking and climbing activities should be less, so as not to affect the blood flow of the hip. 5.Patients with congenital or developmental diseases of the hip, such as congenital acetabular dysplasia and flat hip, should pay attention to prohibit overloading and overworking of the hip joint to avoid accelerating the development of the disease. Although femoral head necrosis is difficult to treat and has serious consequences, it is also a preventable and treatable disease, so don’t be afraid to “throw yourself at the doctor”. Fear is due to ignorance, and ignorance brings blindness and economic waste. We hope that people will come out of the misunderstanding of femoral head necrosis, so that the quality of life of everyone can be improved and improved.