Dermal filler is a gel-like substance that is injected below the skin to replace volume loss and remodel collagen. Fillers help to soften the appearance of wrinkles. They can help under eye circles, increase volume in the cheeks, smooth deeper facial lines, and recontour the face. Other indications of filler are correction of atrophic/traumatic scars, lip augmentation, and volumization of the face in areas of fat loss.