Flat warts on arms can be removed by medication and physical therapy.
1. medication: flat warts are caused by HPV (human papillomavirus) infection. You can use fluorouracil ointment, imiquimod ointment, retinoic acid ointment and other topical drugs to apply topically. The use of drugs must be under the guidance of a professional doctor.
2. Physical therapy: Physical therapy such as laser, freezing and electrocautery can help remove lesions and reduce recurrence.
You should avoid scratching the affected area in order to prevent the lesions from increasing and spreading. Specifically need to go to the hospital, under the guidance of the doctor reasonable treatment.