A filler is an inert substance (commonly hyaluronic acid) which is injected into depressions and wrinkles around the eyelids and face. It can also be used to enhance and to fill the lips. Common areas treated by Dr. Pakrou include the lips, tear trough area below the eyes, and the lines between the nose and the mouth (nasolabial folds). Other areas that often benefit from fillers are the midface (to plump up and lift the midface) and the cheekbones. There are many fillers on the market and Dr. Pakrou will discuss the best options based on the desired outcomes.nSome fillers are enhanced with rejuvenating compounds and factors, which over time can improve the quality and radiance of the skin. Most fillers are temporary and results last between 6-12 months based on the product used, and the area being treated. Most of the fillers used can also be dissolved if the desired outcome is not achieved.