Example of a pigment spot: Nitrogen is sprayed onto the area to be treated with a tiny glass tip. The surface of the treated area is frozen, causing the top cells to die. After about 2 weeks, the stain has faded or disappeared completely. A follow-up treatment improves the result if it is not optimal after the first time. To avoid scarring, less is more. Sometimes the pigment spot appears darker after the first treatment, this is because it was darker in the deeper layers of the skin. This is now pushed upwards, so to speak, and disappears completely after a maximum of two follow-up treatments. As a local procedure, also known as cryosurgery, freezing techniques are used in medicine to destroy altered tissue. In medicine, the working range is -70°C to -200°C. We work in the cosmetic field at a temperature of -89°C. In the case of a finer scar, a line is drawn over the scar like a pen. The process is repeated every 14 days until the scar tissue has disappeared. Age spots usually disappear after the first application.