Dermal fillers are gel-like, volumizing substances that are injected beneath the skin to restore lost volume, smooth fine lines, and deep creases, or enhance facial contours. You should be able to notice results immediately after receiving filler injections. The results are temporary; lasting 6 to 12 months or longer before the body gradually and naturally absorbs the particles. Be aware that you might not achieve the results you want with just one treatment. Depending on how your body reacts to the injections, you might need additional sessions.