Hello! My name is Jessica, I am a physician assistant, and one of the providers at Aesthetic Skin in Winnetka and Chicago. This is a great question. Sculptra could be an excellent option for addressing the sunken lower face you're noticing. Sculptra is a dermal filler that works differently from traditional fillers; it stimulates your body's own collagen production over time, gradually restoring volume and improving skin texture. This makes it particularly effective for areas like the lower face, where fat loss or facial volume depletion can lead to a hollowed appearance. Rather than just filling in the volume immediately, Sculptra promotes long-lasting results as it helps your skin build its own structural support, creating a more youthful and refreshed look. Typically, multiple sessions are required for optimal results, but many people see gradual, natural-looking improvements as the collagen production increases. Since you're 20 and experiencing changes in facial volume, Sculptra could help restore a fuller, more contoured appearance to your lower face while giving you a subtle and long-term enhancement. I hope this helps and best of luck!