Autologous fat will generally extract thigh fat purification for breast filling, and its hazards include the following: 1, fat survival rate problems: the current survival rate of fat after transplantation is about 50%, and if the amount of transplantation is too large at one time, the number of its non-viability is higher. Transplanted fat that does not survive can lead to fat liquefaction, absorption or fibrosis and the formation of hard knots. Excessive liquefaction can easily lead to the occurrence of infections, while hard nodules formed by fibrosis can make the candidate worry if a swelling has grown. Therefore, in order to avoid these situations, autologous fat breast augmentation must be injected in small amounts and several times in order to finally achieve the desired effect; 2. Rich blood supply to the breast: During the operation, if the injection location is wrong and the transplanted fat is mistakenly injected into the blood vessels, it can cause a series of complications, such as pulmonary embolism, or even cause intracranial embolism, which can eventually lead to death. Therefore, it is recommended that patients go to regular medical institutions and undergo autologous fat breast augmentation surgery. If the candidate is in a regular medical institution, by professional breast plastic surgeons for autologous fat breast augmentation surgery, the surgery is generally safer; 3, the thighs were extracted fat, can lead to the extracted parts of the dark color, bumpy.