Cryotherapy is a technique that uses extreme cold to treat skin lesions. Abrupt freezing causes immunological changes and tissue destruction. The most commonly used chemical agent is liquid nitrogen, at a temperature of -195.8ºC.
The main indications are: warts, condylomas, solar melanosis, benign tumors, pre-malignant lesions (actinic keratoses), some skin cancers, molluscum contagiosum, among others.
The side effects of cryotherapy include pain, blistering and skin discoloration, which may take the form of a small spot that is generally lighter than normal skin, or even cause permanent scarring, depending on the type of injury being treated. Some lesions require more than one treatment session, especially the denser ones.
It is a safe, fast and effective method, when properly indicated and correctly applied.