Fillers are injectable substances used to add volume, smoothen lines, and enhance contours in various facial areas. These fillers, commonly made of hyaluronic acid or collagen, are injected beneath the skin’s surface to plump up areas like lips, cheeks, and nasolabial folds. They work by attracting water to the area, providing a fuller, more youthful appearance. Fillers are a popular non-surgical cosmetic option for those looking to restore volume and address specific facial concerns.