Dermal Fillers aim to restore lost fullness to the face. These injectables can also be used to diminish dark under-eye circles and even rejuvenate the appearance of aged hands. Fillers are injected under the skin using a fine needle. Dermal fillers work to fill in areas of concern such as deep set lines around the mouth or loss of firmness in the cheeks. They can also be used to give a non-surgical facelift by injecting small amounts around the face at various points.