The human papillomavirus(HPV) causes warts, which are a type of skin infection. On the skin, the inflammation causes rough skin-colored bumps to form. It is a highly contagious virus. It is possible to get warts from touching someone who has them. You can find warts are most commonly on the hands, but they can also appear on the feet, face, genitals, and knees.
Freezing warts is one method used by doctors to remove them. It is also known as cryotherapy. A doctor applies liquid nitrogen, a cold substance, directly to warts during verruca freeze. It results in warts freezing.