Filler is a treatment that injects hyaluronic acid gel to manage volume and contour in hollow or deficient areas. With Korean products, options include area-specific packages (nose, lips, chin, under-eye, nasolabial folds, forehead), packages combined with Botox, and an MD Code full-face 10cc package; the under-eye + front cheek and peanut-shaped face packages include one touch-up. Other areas are offered per 1cc.