O-legs are a problem for beauty seekers. Many people think that the cause of O-leg is congenital and has nothing to do with acquired factors. Actually, this statement is wrong. Because if the walking posture of the day after tomorrow is not correct, the legs will be in a bad state for a long time, and O-shaped legs will also be formed. Li, the first person of leg plastic surgery in China, said that autologous fat transplantation is an effective way to correct O-leg's walking posture. Incorrect walking posture will make the whole body weight press on the outside of the foot. In the long run, it will lead to the loss of adipose tissue on the inner side of the calf and the more developed muscles on the outer side, thus forming an ugly O-shaped leg. Therefore, in order to correct the O-leg, we must first fill the fat defect on the inner side, and then reasonably shape the muscles on the outer side of the calf to improve the state of the O-leg. The biggest advantage of using autologous fat transplantation to correct O-leg is that it can achieve the purpose of losing weight while correcting O-leg. For beauty seekers who are still troubled by thigh or waist obesity, this method can also kill two birds with one stone.