What Causes Warts?

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All warts, both genital and non-genital, are caused by Human PapillomaVirus or HPV. There are as many as 100 different strains of HPV, most of which do not cause disease. The HPV subtype associated with Genital Warts is a relatively benign form that does not become cancerous over time. Other HPV strains have been linked with cancer of the cervix, vagina, vulva, penis and rectum. All HPV is spread by contact, i.e., touching the skin of an affected person or surfaces contaminated with the virus. Abrasions or irritations of the skin or mucous membranes provide the route of entry. Genital warts come from sexual contact with an HPV carrier. In some carriers it can take months or years for warts to develop. Other carriers transmit the virus but never develop genital warts themselves presumably from immunological resistance to the virus.

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