Filler treatments involve injecting substances like hyaluronic acid or collagen into specific areas of the face to add volume, smooth wrinkles, and enhance facial contours. They’re often used to plump lips, soften nasolabial folds, and restore youthful fullness to cheeks. Fillers are a popular non-surgical option for rejuvenating the face, with results lasting anywhere from several months to over a year depending on the type of filler used.