Cryopreservation is a treatment in which a small amount of liquid nitrogen is taken with a cotton swab Zhan, lightly pressed on the lesion for a very short time, and then removed. Indications Various warts, basal cell carcinoma, Bowen’s disease, seborrheic keratosis, nodular itchy rash, infectious molluscum contagiosum, etc. Precautions 1.After freezing, you will feel pain and then blisters or blood blisters will appear. 2, about 10 days local do not contact water 3, easy to infect parts such as the foot after freezing is recommended to take oral antibiotics