Dermal fillers are sometimes referred to as soft tissue fillers and are substances designed to be injected beneath the surface of the skin to add volume and fullness. As we age, the natural collagen and elastin in the skin lessens, and the cells lose their ability to naturally produce more of these substances. This can result in severe resting lines and volume loss. There are several different types and consistencies of filler and each one is designed to address a particular concern in the face.