Double chin is a common term for what is medically known as jaw fat accumulation, which is mainly caused by excess fat and loose skin. The formation of double chin is related to factors such as face shape, obesity, age, poor posture, and poor chewing habits. Treatment should be selected for different reasons. Usually, double chin is due to the accumulation of fat under the chin chin thickening, appearing bloated chin. Weight loss can be carried out, and the local problem will be obtained after weight loss. You can also improve the double chin by eliminating the excess fat through local liposuction and laser lipolysis. A double chin also occurs when the ligament under the chin loosens and the ability to restrict the tissue under the chin becomes weaker, giving the chin a sagging sensation. It can be improved by restoring the elasticity of the ligaments through liposuction. If shortening of the chin occurs, the chin position can be adjusted by chin injection to enhance support, which can also effectively improve the double chin situation. At a later stage, local subcutaneous suspension can be performed to reset some tissues and ligaments to fundamentally achieve a comprehensive lifting of the neck and achieve cosmetic effects.