At present, there is no clinical data on how long the conservative treatment of osteonecrosis of the femoral head should last. The choice of conservative treatment needs to be considered according to the condition of the patient, and if the effect of conservative treatment is not good, surgery should be considered. For patients in stage 0, if one side is diagnosed as non-traumatic femoral head necrosis, the other side should be highly suspicious. At this time, it is advisable to perform bilateral MRI, and it is recommended to follow up every 3-6 months, and to use anticoagulation combined with vasodilator drugs, such as prostaglandin, low molecular heparin, and warfarin, etc. for conservative treatment. For patients in stage 1 or 2 with clinical symptoms or necrosis of 15% to 30%, non-surgical treatments such as lower limb traction should be actively performed. For patients with severe venous stasis and arterial ischemia, surgical treatment with joint preservation, such as core decompression, is also feasible. For patients in stage 3~4, it is recommended to consider age and other factors to choose the appropriate surgical program, such as osteotomy or artificial joint replacement surgery. The above medicines should be used in accordance with the doctor’s prescription. When femoral head necrosis occurs, it is recommended to actively cooperate with the doctor’s treatment.