A photofacial is a 30-minute procedure in which intense pulses of light are used to penetrate deep into the skin. The photofacial then causes collagen and blood vessels below the epidermis to constrict, reducing redness and age lines. The procedure involves only minimal discomfort, and the redness and swelling that sometimes occur after treatment disappear shortly. Most benefits of a photofacial occur gradually in the weeks following treatment.