The area is anaesthetised using a topical (cream) anaesthetic. A stream of cold air is used to further improve anaesthesia. The treatment is quick and may take 15 to 45 minutes depending on the size of the area. After treatment the skin is red and is swollen for two to three days. This is then followed by a fine sandpaper-like exfoliation of the epidermis. Some areas such as around the eyes are more prone to swell than others. Redness is easily concealed with makeup. Over the ensuing weeks and months there is collagen remodelling as well as reduction of the pigment that often accompanies scarring.