Fillers are a cosmetic procedure usually used to correct wrinkles, loss of volume or hollows in the skin. Fillers usually consist of substances such as hyaluronic acid and calcium hydroxyapatite. These substances are injected under the skin to help fill wrinkles, restore volume or contour specific areas. Fillers are usually quick and minimally invasive, but can have side effects and risks. Some side effects such as temporary swelling, bruising or tenderness may occur after the application. It is important to consult and evaluate the specialist doctor before filler application.