Autologous fat injection is not easy to cause immune and rejection reactions, but because it is autologous tissue, there may be some absorption problems, and the absorption rate is different according to the individual's physique, so there may be a need for secondary injection treatment, but because it is autologous tissue, there may be some absorption problems, and the absorption rate is different according to the individual's physique, and the cost is higher. 2. The survival rate of fat granule transplantation is not high. 3. Need multiple injections. Sometimes it is necessary to adopt the method of "several times", which is overkill. Because of the unstable therapeutic effect, the wide application of this surgical method is limited.