Treatment of verruca plana: 1) Oral drugs: antiviral drug: Virulin, 0.2g each time, 3 times a day, 1 month as a course of treatment; Or famciclovir, 0.2g each time, twice a day, and the course of treatment is the same as before. Drugs for improving immunity: oral levamisole 50 mg, 3 times a day, and withdrawal for 3 days+1 1 day. Others: Take 25,000 units of vitamin A each time, three times a day. Oral lysozyme, 5 ~ 7 tablets each time, 3 times a day. Oral urotropine, 0.3 ~ 0.5g each time, 3 times a day. 2) Injection: Vitamin B 12: each time 100 mg, intramuscular injection 1 time every day, with 30 days as a course of treatment. Transfer factor: subcutaneous injection, 2 ml each time, twice a week, 30 days as a course of treatment. Polycyocyte: intramuscular injection, 2 mg each time, 1 time, every 3 days 1 time, 30 days 1 course of treatment. It can also be injected into skin lesions, and the curative effect is better. Banlangen injection: intramuscular injection, 2ml twice a day, two weeks as a course of treatment. At the same time, 30g of Radix Isatidis is used to smoke and wash wart skin, 2-3 times a day. 3) Local drug therapy: 5% fluorouracil ointment was applied externally, and 1% chlortetracycline ointment was applied externally the next day to alternately remove warts. You can also use 0. 1% retinoic acid ointment or 50% rasonosine solution for external use twice a day until it subsides. If the local skin is slightly red or inflamed after external application of the ointment, it is not necessary to stop taking the medicine, because mild inflammation can promote the regression of verruca plana. 4) Cryotherapy with liquid nitrogen or laser therapy: dermatologists are required to operate. .