CoolSculpting is a non-invasive fat reduction treatment that uses controlled cooling to freeze and eliminate fat cells. It is often used on areas with stubborn fat, including under the chin. The destroyed fat cells are gradually eliminated by the body over several weeks.
Ultherapy uses ultrasound energy to stimulate collagen production and lift and tighten sagging skin. While it may not specifically target fat, it can improve the overall appearance of the jawline and neck.