Flat warts is a contagious disease, this disease is proved to be caused by human papillomavirus infection, usually more common in adolescents, the virus tends not to appear person to person transmission, most of the patient’s own one part of the infection to another part of the patient, there is no effective way to eradicate this virus. Most patients are able to achieve clinical control with aggressive treatment, and the goal is achieved. This disease has a certain self-limiting, part of the patients, although not through the treatment, in 1-3 years after getting the disease will also have the possibility of cure. It is recommended that patients with flat warts should not be overly nervous, maintain good living habits and exercise habits, and through the positive and effective treatment of regular hospitals, most of the patients can receive more satisfactory results.