At present, the best method for facial depression plastic surgery is fat injection. The range of cheeks is small, so no matter how thin people are, they can suck out a small amount of fat from other parts of the body and inject it into both cheeks equally after treatment. Except a small part of injected adipose tissue will be absorbed, other parts will "settle" in the affected area. If the fat injection does not meet the requirements after one injection, additional injections can be made. Because some of the injected fat will be absorbed, the injection amount is generally larger than the design amount, so the cheeks will look slightly fat at first after injection, but they will return to normal after one month.