For people who are height/weight proportionate or just slightly overweight, the emergence of a double chin can be frustrating and disheartening, especially since it is impossible to "exercise" your double chin fat away. Double chins occurring to healthy people are typically due to genetics or aging. If your parents or grandparents have double chins but are not obese, there’s a good chance you may eventually see a double chin develop. Muscle loss and skin loosening due to aging can also contribute to double chins, as certain muscle cells in your neck and chin area deteriorate and more adipose tissue deposits arise.