Flat warts can be treated with topical injections such as pindamycin. Flat warts are benign skin growths caused by human papillomavirus infection, a viral skin disease that can be contracted through direct or indirect contact with a person infected with the virus. They usually appear as localized flat, raised brown or skin-colored papules and are found on the face, back of the hands, and forearms. Flat warts can be treated with injections. The method is to use pingyangmycin, diluted with procaine and then injected at the root of the warts, suitable for refractory common warts and plantar warts. In addition, the common treatment methods for flat warts mainly include topical drugs such as retinoic acid, 5% imiquimod, etc. If the number of skin lesions is small, physical therapy such as freezing, electrocautery, scraping, etc. can be used to treat. The actual warts are recommended to go to the regular hospital, under the guidance of the doctor to carry on the standardized treatment.