The filiform warts on the penis indicate the presence of human papillomavirus infection, which is usually caused by direct contact infection, indirect object contact infection, wound contact infection and other factors. 1. direct contact infection: for example, sexual partners have filiform warts, and sexual partners frequent close contact, it is easy to make the male penis filiform warts, is the main cause of filiform warts. 2. Indirect object contact infection: and filiform warts patients share some toiletries, such as towels, washing utensils, etc., if the frequent use, may induce filiform warts. 3. Wound contact infection: when the penis part of the existence of wounds, close contact with the human papilloma virus may be through the wound into the human body, will be induced filiform warts.