Today, substances such as hyaluronic acid, calcium hydroxyapatite, polycaprolactone and poly-L-lactic acid are used for filling purposes. Among these, hyaluronic acid is the most commonly used and can be applied in almost every area of the face. Nose, lips, cheekbone, chin and jaw line (jaw-line), nasolabial lines, marionette lines, temple, orbital groove and forehead are the application areas of filler. Be sure to ask your doctor for the sticker containing the brand, expiration date and Lot number of the filler used and keep it. It is very important to know the filler used in the next application.