Laser removal of flat warts may leave scars. Flat warts is a disease caused by human papilloma virus infection of the skin, the patient’s skin will appear slightly elevated flat pimples, mostly in the face, the back of the hands and other exposed areas. Usually, you can choose laser treatment to remove the small number of lesions flat warts, such as carbon dioxide laser, is through the principle of photothermal damage to the skin lesions, and warts off, but may be painful, if the treatment level is deeper, there is a possibility of scarring. But if the treatment level is deeper, there is a possibility of scarring. However, reasonable operation, and pay attention to the care after the operation, usually will not be scarred. For those who need to take laser treatment for flat warts, it is recommended to go to a regular hospital to consult with a doctor and cooperate with the doctor to carry out standardized treatment.