Dermal fillers are safe, gel-like injectable substances that smooth creases, fine lines, and wrinkles to rejuvenate your skin and add volume and fullness to your face. Dermal fillers can be used to enhance your lips, fill your cheeks, straighten out your jawline, soften grooves underneath your eyes, and many other cosmetic alterations to reduce the visible effects of aging. Dermal fillers do not fill in wrinkles but rather add volume to the desired area in order to reduce the appearance of wrinkles in your skin.