Although autologous fat transplantation breast augmentation has many advantages, it does not mean that the technology is a panacea. There are two sides to everything, the following is mainly about the risks and sequelae of fat breast augmentation: 1, nodule formation or hard knot formation: this is the most common complication of fat breast augmentation, after transplantation, part of the fat is absorbed, and part of the fat, although it survives, may be wrapped up by the surrounding hyperplasia tissue, and the hyperplasia of the adherent tissues is not as soft as the fat, and there will be a sense of nodules or hard knots when you feel it. 2, the effect is not significant, the need for multiple surgeries: fat grafting there is a certain absorption rate, only the unabsorbed fat has the role of breast augmentation. Therefore, one fat breast reduction does not achieve the desired effect, and several injections of transplantation are needed in the later stage. 3, fat necrosis: fat tissue itself does not have a particularly rich blood supply, and after transplantation to the breast, it mainly relies on the surrounding blood vessels to grow in to provide nutrition. If the amount of locally transplanted fat is too much or the speed of neovascularization is slow, the adipose tissue does not get timely nutritional support, and part of the transplanted fat will be necrotic, localized fluid accumulation, and even secondary infection and other serious consequences. 4, infection: any invasive operation has the risk of infection. Although fat breast augmentation has no incision and little trauma, it is an invasive operation after all, and the operation does not strictly follow the principle of asepsis and local fat necrosis will cause infection, and infection will aggravate the fat necrosis, which will be the cause and effect of each other, and fall into a vicious circle. 5.Hematoma: The formation of hematoma is mainly related to the operation method is too rough. Fat injection transplantation, into the needle, out of the needle may damage the blood vessels, such as damage to small blood vessels, bleeding can still stop by itself. But if the larger blood vessels are damaged, hematoma will be easily formed. 6, pneumothorax: pneumothorax is not common, but once it occurs, it will have serious consequences. Pneumothorax occurs mainly because the injection tube punctures the intercostal muscles and pleura. Having said so many risks, many women may be deterred from fat breast augmentation, in fact, it is not necessary. Today, the technology of breast augmentation with autologous fat transfer is very mature, and the most important thing is to choose a regular medical institution and plastic surgeon to avoid these risks.