In recent decades, cryosurgery is one of the most important sectors of interventional dermatology.

The cryogen that is used today is mainly liquid nitrogen which has a boiling point of - 196th C. Nitrogen gas is odorless, not toxic nor flammable and is easy to transport.

It is used for the treatment of malignant diseases, precancerous lesions, and finally the skin malignancies, as an alternative when surgical removal is contraindicated.

The method reduces the temperature of the skin at very low levels, thereby causing local tissue damage. Wound healing is followed by secondary intention.