The recurrence of common warts caused by freezing can be treated again with liquid nitrogen cryotherapy, or laser or surgical treatment, topical medication and other ways of treatment. 1. Liquid nitrogen freezing: use liquid nitrogen externally on the plantar warts, after freezing, there will be pain, blisters and other common adverse reactions. Pay attention to keep the wound clean and dry. Antibiotic ointment such as fusidic acid can be applied to prevent infection. 2. Laser or surgical treatment: After local anesthesia is injected, a CO2 laser is used to cauterize the rash. Alternatively, surgery can be performed to remove the warts. Laser or surgical treatment is less likely to recur than liquid nitrogen freezing, but it is important to prevent infection, keep the wound clean, and use anti-infection drugs. 3. topical drugs: commonly used drugs are fluorouracil ointment, vinblastine ointment, etc., can make the skin lesions peeling, pay attention to easy skin irritation and other adverse reactions. And need to be used for a long time, the therapeutic effect is not good. Specifically should go to the hospital, under the guidance of the doctor for treatment.