There are more than 100 subtypes of human papillomavirus, and different subtypes of virus infections cause different diseases in humans. The papillomavirus is infectious, mainly in two ways: first, direct transmission: and patients with papillomavirus have sexual contact or body parts in direct contact with warts, newborns appear to be infected, also through the birth canal direct infection caused. Second, the indirect route of transmission: contact with the papilloma virus patients used towels, underwear, bathtubs, etc., the skin has a slight laceration, scrapes, the virus is easy to infect through the skin.