In fact, double chin in human body is the deposition of fat in the chin, and there are more actual causes, including deposition of fat, local skin laxity, and most of all, muscle laxity at the bottom of the mouth. If the body fat is reduced, the double chin can definitely be improved. The degree of local skin tightness can also affect the formation of double chin. In reality, there is no way to lose body fat locally, unless you do medical cosmetic surgery. If you use the whole body weight loss method, you can rarely directly lose the local area, you can reduce the body fat content through diet and exercise, and then the fat will be lost in a more balanced way in all parts of the body, rather than just the local area. Plastic surgery requires very high clinical experience and fine operation, and it is recommended that patients go to regular hospitals for aesthetic plastic surgery treatment.