Shadowing and hollowing beneath the eye that makes you look tired. A delicate area that rewards conservative, staged treatment — often best approached alongside the cheek.
Shadowing under the eyes is often more about lost volume in the midface than the under-eye area itself, which is why this is one of the more technique-dependent treatments on the list. It's typically approached in small, staged amounts, sometimes alongside cheek filler, since supporting the cheek first can reduce how much product the tear trough actually needs.
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.