Autologous fat chin pad, also known as autologous fat filling chin surgery, refers to the body’s more abundant fat parts, such as the abdomen, buttocks, thighs and other places of the fat, with swelling liposuction method to suck out, special treatment into pure fat particles, and then injected implantation of chin, in order to change or improve the shape of the chin. It has the advantages of good and solid tissue compatibility and no rejection reaction, but there are certain risks, as follows: 1. Infection: caused by bacteria in the patient’s mouth and uncleanness during the filling surgery; 2. Hematoma: damage to small arteries, veins and capillaries during the surgery, resulting in blood seepage without adequate hemostasis and pressure bandage; 3. Fat liquefaction and calcification: injecting too much adipose tissue or injecting it to make the fatty tissue naturally agglomerate into lumps. Adipose tissue naturally gathered into blocks, so that the central part can not get timely nutrition, resulting in the injection of fat failed to survive, resulting in fat necrosis, liquefaction, or even calcification; 4, fat absorption: postoperative fat absorption is one of the most common complications, the absorption rate is usually between 30% -70%; 5, chin filler unevenness: may be due to uneven injections or fat particles of varying sizes caused by gravity, may also make the fat gravity effect, and may also make the fat gravity effect, and may also make the fat gravity effect, may also make the fat gravity effect. 6, local skin necrosis: mainly due to the injection of fat particles mistakenly into the blood vessels and caused by the fat particles, easily lead to local skin necrosis, serious cases will cause vascular embolism; 7, poor shaping effect: for patients with severe jaw shortening, due to fat and silicone and other prosthesis compared to the unshapable, relying on the accumulation of shape, the effect of the sense of the contour is not as good as the prosthesis.