The main prevention of infection and daily care of plantar warts after freezing. 1. Prevent infection: when the pain after freezing will be 1-2 days can be relieved by themselves; if the pain lasts a week, or the wound appears red, swollen, hot and painful, purulent secretion should be as soon as possible to the clinic for follow-up, anti-infection treatment. When liquid nitrogen cryotherapy metatarsal warts after the appearance of blood blisters or blisters, is a common postoperative reaction, can be self-absorbed. If it affects your life, you can use a sterile injection to extract the blister fluid after local disinfection, retain the blister wall, and apply pressure bandage. If it ruptures on its own, antibiotic ointment can be used topically to prevent bacterial infection. 2. Daily care: keep the wound clean, the blister intact can touch water, avoid tearing and rubbing. Try to let the scab come off by itself. When frozen will lead to the loss of pigment in the center and hyperpigmentation around, so pay attention to sun protection. Specifically under the guidance of the doctor, once there is discomfort, go to the hospital as soon as possible.