Blistering is the medical term for blistering. After freezing blisters, generally 3~7 days can be eliminated. Cryotherapy belongs to the dermatology of a physical therapy measures, after treatment of skin blistering is a normal recovery process, you should keep the skin clean and hygienic, to prevent infection, the general blisters 3 ~ 7 days can subside, if there is a secondary bacterial infection, may subside time will be extended. After the operation, you should disinfect the wound and the surrounding skin with iodophor every day, wear loose and comfortable soft clothes to reduce local friction, and choose light, soft and easy-to-digest and absorb food for your diet. If there is secondary infection, you can use antibiotic drugs such as erythromycin ointment and mupirocin ointment externally under doctor’s guidance.