Kybella is approved for use under the chin, so use in the mons pubis would be off label. That said, Kybella works by permanently dissolving fat cells and will "work" wherever it is injected. However, the side effects, which include swelling and numbness and which may least several months, may be undesirable in this location. Kybella typically does not cause sagging skin or a deflated look. In contrast to liposuction, there is less fat tissue destroyed, and the inflammatory response from Kybella causes some tissue tightening. If you're bothered by fat in this area, I'd encourage a consult with a physician experienced in both tumescent liposuction (safer and fewer complications than traditional liposuction) and Kybella. Both procedures are safe and effective when used properly.