Flat warts will not go away without treatment, and they are generally contagious, so they should be treated as soon as possible. The main use of physical therapy and external drug treatment, systematic drug treatment is mostly used for the number of lesions or a long time to cure the person. 1. Physical therapy: freezing, electrocautery, scraping and laser are all effective treatments, and those with a large number of lesions can be treated in batches. 2. Topical medication: For those who are not suitable for physical therapy, you can use retinoic acid ointment externally, which has a certain effect on flat warts. 3. Systemic medication: immunomodulators (such as interferon, levamisole, etc.) can be used. The most important thing to remember is that flat warts can occur suddenly, and there are usually no conscious symptoms, so when you find them, you should go to a regular hospital for treatment, and choose the right treatment to improve your quality of life under the guidance of a professional doctor.