One simple answer: genetics. It’s nothing that you are doing; it’s simply what your chromosomes have dictated. That said, there are several different approaches you can take. 1)Do nothing. It might sound strange coming from a plastic surgeon, but you have not asked about having surgery or doing anything to alter your looks! It is crucial to listen to patients, so – unless you wished to change your profile – I would not recommend anything for you. If you wished to change your profile, you could 2)Try an injectable. You could opt for minimally invasive procedures such as Kybella into the submental (neck area under the chin) region to dissolve the fat, as well as a filler such as a Radiesse to add projection to your chin. (The Kybella treatment is permanent but is comprised of a series of injections, usually 3 to 4, spaced about one month apart. The Radiesse is not permanent and usually dissolves after a few years.) 3)Have surgery. With most procedures in plastic surgery, the more invasive a procedure, the more transformative the results. A chin implant and liposuction of the neck would give you permanent results and would address your under-projected chin, and the excess fat of your submental region.