Liposuction is not a weight-loss technique. It is a mechanical means of removing excess fat from the body, including from underneath the chin. After your liposuction, you will maintain your newly contoured proportions, whether you gain or lose weight. The liposuction will not affect fat in the rest of your body, including the face. If you want to lose weight in your face, you will need to do so by losing weight overall. You may also want to consider noninvasive fat-elimination techniques, such as Vanquish, CoolSculpting and ThermiTight. Please consult a board-certified dermatologist who can help you decide how to contour your body with liposuction or other techniques.