Kybella contains deoxycholic acid, a naturally occurring substance in the body that aids in breaking down and absorbing dietary fat. When injected, it destroys fat cells permanently. The treatment involves multiple small injections under the chin. Post injection, patients may experience swelling, numbness, or bruising around the area, however, any symptoms typically subside within a couple of weeks. It is important to note that while Kybella can treat mild-to-moderate submental fullness caused by excess fat tissue under the chin, it is not intended for treating sagging or loose skin. Furthermore, individuals with extreme cases of submental fullness may require surgical procedures such as liposuction with a neck lift.