CoolSculpting

Yes, CoolSculpting can treat submental fat. Applicator options vary, and a provider selects the appropriate one for the area being treated, such as the neck and chin, similar to how larger applicators are used on the abdomen or flanks. It's a reasonable option if you have a distinct pocket of fat and good skin elasticity, since CoolSculpting doesn't tighten skin. Results typically appear gradually over about one to four months as the treated fat cells are cleared. Other options for the double chin include Kybella injections, which dissolve fat cells chemically over a series of treatments, and submental liposuction, which gives a more immediate and controllable result in one session. Which approach fits best depends on how much fat is present, your skin quality, and whether there's any muscle laxity contributing to the fullness under the chin. I can't assess your specific anatomy from a description alone. An in-person exam, or at least photos reviewed with a board-certified plastic surgeon, would help determine whether you're a better candidate for a non-invasive fat-reduction treatment or a surgical option.