Liquid nitrogen freezing may leave scars. Liquid nitrogen freezing may leave scars, but also need to be based on the individual after the liquid nitrogen freezing specific recovery situation to decide, liquid nitrogen freezing belongs to a kind of cryobiological synthesis effect, the use of refrigerant to produce low temperature to make the lesion tissue necrosis in order to achieve the therapeutic purpose. After freezing, the local tissues can be seen to be white and swollen, blisters can occur within 1 to 2 days, then dry and crust, and the scabs come off in 1 to 2 weeks. Liquid nitrogen freezing may lead to local skin irritation, if the area is relatively small, it will not affect the skin, if the treatment area is relatively large, due to different individual differences, it may leave scars. It is recommended that patients go to a regular hospital, under the guidance of the doctor, according to the patient’s specific condition, to take targeted treatment.