1. medication: flat warts is a relatively common dermatological disease, mainly caused by human papilloma virus infection, you can follow the doctor’s instructions to use the appropriate medication, commonly have Vitamin A ointment, salicylic acid, imiquimod cream and other topical medication, but also can be taken internally levamisole, cimetidine and other immunomodulators. 2. Freezing treatment: flat warts on the hands can also be treated by freezing method, this method is to freeze the skin tissue with liquid nitrogen under low temperature, the lesion tissue will be frozen to death, so as to achieve the therapeutic effect. 3. laser treatment: laser treatment is the use of super pulsed carbon dioxide laser on the lesions of the treatment, is also often used for the treatment of flat warts. If you have a flat wart on your hand, it is recommended that you go to a professional hospital and choose a suitable treatment plan under the guidance of the doctor.