Liquid nitrogen freezing is widely used in dermatology to treat superficial growths such as common warts and other viral diseases. After liquid nitrogen freezing, localized blisters often appear, and some may even be dry, flaky, etc. In principle, as long as the skin is not broken, you can touch water. In principle, as long as there is no skin breakage or oozing after freezing, you can touch water, especially in the treatment of plantar warts and common warts, these blisters are not touched before the breakage of the blisters can be appropriate to touch water, but if the blisters rupture after the liquid nitrogen freezing and there is oozing, it is best not to touch the water in order to avoid the emergence of bacterial infections and other situations.