Regular review after hip preservation treatment for femoral head necrosis is very important. Many patients are afraid of trouble and do not review in time, and when they do not recover satisfactorily and then look for a doctor, they have often lost the opportunity to remedy the situation. The main contents of the review include: understanding the pain and checking the function of the hip joint; taking X-rays (MRI and CT examination if necessary) to understand the repair of femoral head necrosis, whether there is collapse, assessing the risk of collapse, etc., so as to guide the patient’s recovery; deciding whether the patient can walk normally, whether he needs We will decide whether the patient can walk normally, whether the patient needs crutches or a wheelchair, and provide guidance on Chinese medicine treatment. If you do not have the conditions to come to our hospital, you should go to a local hospital with better facilities at the same time to take bilateral orthogonal frog X-rays of the hip joints and send them to your attending (main surgeon) by postal courier or by e-mail together with your recovery, so that your doctor can have a comprehensive understanding of your changing condition and guide your recovery. From the second year after treatment, review every six months; from the third year after treatment, review once a year and continue for a long time.