Hollow Temples can be treated with dermal fillers, so as to re-establish the natural volume of the temples and lift the eyebrows. Dermal filler is a substance that is injected into the dermis of the skin in order to fill and hydrate the area. Although there are many different types of fillers, the most popular are hyaluronic acid (HA) fillers. HA is a substance that already exists in the skin. Dermal fillers can have different structures and consistencies that make them more suitable for treating different areas. For example, when treating the temples, we use a filler that is smooth and volumising deficiency (temporal hollow).