VERRUKILL CRYO is a freezing removal treatment that acts immediately causing the area in question, from the wart to the root, to freeze for a few seconds. The area of skin that comes into contact with the frozen foam becomes white and a temporary slight burning and painful sensation may be felt. This is absolutely normal. After treatment, a small, invisible blister will form at the root of the wart, helping it to come loose. In most cases, 10-14 days after the treatment, the wart will detach and disappear, thereby aiding the growth of healthy skin.