? Facial fat filling is now a common operation in cosmetic surgery. Because after it is filled, one is to improve the overall contour of the face and make the face full. Especially fat and stem cells make the skin feel better. The first complication is infection. If infected, because it is deep in the skin, it is difficult to drain, and it is easy to cause a large area of facial scar. In addition, there is a particularly important problem, that is, fat can't hit blood vessels, which will cause great problems, especially where there is a dangerous triangle on the face, that is, from the eyes to the nose, where there is no venous valve. Once a large cellulite touches this vein, it can directly flow to some arteries in the deep brain, which will cause some embolism or blindness. These are still very risky, so we must find some experienced doctors and regular hospitals to do them.