An injection used to improve the appearance of double chin. Schedule a complimentary consultation to discuss if Kybella is right for you. Diet and exercise are important but they do not always help you pinpoint problem areas like your chin. Are you bothered by fullness under your chin? Kybella permanently destroys fat cells under the chin and then the body’s natural metabolism processes the fat. More than one treatment at 4-6 week intervals may be recommended.