Filler improves chin projection and balance in profile, and softens the lines running down from the mouth corners. A few units of Botox smooth a dimpled, “pebbled” chin.
A chin that sits slightly behind the rest of the face can make the whole profile look imbalanced — filler here restores projection and can soften the marionette lines running down from the mouth corners as a side effect of better support. A separate, much smaller treatment — a few units of Botox — targets the dimpled or “pebbled” texture some people get in the chin when they talk or clench, which is a muscle issue rather than a volume one.
This is general education, not a treatment plan. What you actually need depends on your anatomy, muscle strength, and goals — Rocio determines that with you in person.