Some type of volumizer, whether in the deep crease in front of jowl or by adding volume to the cheeks to make you look more youthful. Hyaluronic acid filler is the most common class of filler, such as Juvederm or Restylane. The difference is Juvederm has a different manufacturing process and has a higher degree of cross-linking, so it is more of a smooth gel and it lasts longer, a year to year and a half. Restylane is more particulate and lasts about six to nine months. A different class of filler is Radiesse, which is made of calcium hydroxylapatite, and is used for creases and folds. Hyaluronic is something we have in body, whereas Radiesse is a white paste. Both add volume and fill in folds, but Juvederm and Restylane can be dissolved if you don't like the way it looks. Radiesse can't be dissolved, so you have it for a year even if you don't like it. Radiesse also can't be used in areas with thin skin, like the lower eyelid tear trough area.