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Cryotherapy for sunspots. Cryotherapy or liquid nitrogen is the most commonprocedure performed by skin cancer doctors. This time tested treatment can be used to treat a variety of skin cancers including solar keratosis or sunspots, superficial skin cancers such as basal cell carcinomas, and intra-epidermal SCCs.
Liquid nitrogen is a diatomic liquid, which means that the diatomic character of the covalent N bonding in N 2 gas is retained after liquefaction. Liquid nitrogen is a cryogenic fluid that can cause rapid freezing on contact with living tissue.