Restylane is dermal filler that treats facial wrinkles and volume loss that happens during the aging process. It is made of hyaluronic acid which is naturally found in the body and it rejuvenates the skin to give the patient a more youthful appearance. Before the injection, the doctor numbs the treatment site. A thin needle is used to inject the Restylane under the skin. The amount of filler is determined by the results desired by the patient. The hyaluronic acid draws water to the treated area and causes the tissue to swell and fill out wrinkles and lines. The doctor massages the treated area to make sure the filler is placed evenly.