Autologous fat breast augmentation is a popular breast augmentation method, which is taken from oneself and applied to oneself, safe and non-rejection, and feels more realistic and natural. But some people have hard nodules after surgery, what is going on? Why would there be hard lumps and nodules in autologous fat breast augmentation? First, the injection into the mammary gland causes. When performing the surgery, the operator accidentally injects fat into the breast, and then hard lumps appear. In addition to hard lumps, it is also easy to cause breast diseases. Second, fat extraction is not handled properly. Due to the backward technology and machines in the hospital when performing the surgery, the fat extracted was not handled well, resulting in too much fat being transplanted to the breast, so that the triglycerides of fat are not absorbed by the tissue, thus forming the appearance of nodules. Third, fat injection is not uniform. Due to the lack of skill and experience of the doctor, there will be uneven injection of fat when injecting fat, resulting in the injection of too many fat particles in a certain place, leading to the formation of these fat particles as a package and finally causing the occurrence of hard lumps. The main levels of autologous fat breast augmentation filling are under the skin, under the pectoralis major muscle and behind the glandular gap, which will not harm the breast gland and will not cause breast nodules. For the lump problem that some friends worry about, it is directly related to the doctor’s technique, and the fat filling needs to be injected into the filling location evenly at multiple points, levels and tunnels, so that it can be well established for blood flow to become active and avoid lumps.