Cryotherapy is a suitable treatment to eliminate certain superficial skin lesions with a technique based on the application of extreme cold, usually liquid nitrogen (-196º C) through a spray system. That nitrogen, administered on the particular lesion, causes the freezing and destruction of the affected cells without impairing the healthy tissue surrounding the lesion. The process usually lasts between one to two minutes and is painless but produces an itching and burning sensation, which may require the administration of local anaesthesia when applied in very sensitive areas. In addition, after cryotherapy, redness, swelling and some blister appear in the treated area, which heals in a few days. Some of the cutaneous lesions for this treatment include: actinic keratoma, viral papilloma, warts or sunspots.
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