As we age, collagen is lost in these facial areas and these lines start to deepen. Dermal fillers are injected right under the skin into to plump up these areas so that these lines are much less noticeable. Injectable dermal fillers can plump thin lips, enhance shallow contours, soften facial creases, remove wrinkles, and improve the appearance of recessed scars. Hyaluronic acid is a naturally occurring substance found in the body that is also commonly used in skincare products. The fillers mostly consist of hyaluronic acid-based gels.