How long it takes for cryotherapy to heal depends on the area where the lesions occur and whether there are blisters and blood blisters after freezing, that is, the depth of freezing. The blistering and crusting of the face after freezing is about 7 days, and the limbs recover in about 7-10 days because the stratum corneum is thicker. If there are no blisters and only mild redness, recovery is usually 2-3 days, the rash may not be completely shed and a second cryosurgery is needed. If there are bloody blisters and blisters are relatively large, it is recommended to go to the hospital for sterilization and fluid extraction treatment and wait for the walls of the blisters to completely crust off, which is about 10 days.