What Is the Cause of Anal Warts?
Anal warts are usually caused by an infection from the human papilloma virus, also known as the HPV virus. This is the same virus that is able to cause warts to appear on other genital areas. The human papilloma virus is usually spread sexually, especially when one person is infected and also has warts. HPV transmission to the anus usually occurs as a result of anal intercourse, although any sexual act can cause the virus to spread there. Most cases of anal warts will occur within three months of the sexual contact with the infected person. Anal warts are usually detected during the course of a physical exam or can be detected casually (i.e. not detected by a physician).
