Liquid nitrogen

This is a substance that is applied to the skin by spray gun, or by a cotton applicator, like a Q-tip. It is so cold when applied to the skin, it feels like a burn, often referred to as a "frost-bite" sensation. Application of the liquid nitrogen lasts for approximately 10-15 seconds. The area treated will immediately appear red, then a scab will form, occasionally a blister may develop. This will heal over the course of ~10 days. This is the treatment of choice for actinic keratoses. It is used for treatment of skin cancers in some cases.

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