Anogenital warts are small lumps that develop on the genitals and/or around the back passage (anus). They are caused by a virus called the human papillomavirus (HPV). There are over 100 types of this virus. Most anogenital warts are caused by types 6 or 11. Common warts that many people have on their hands and feet are caused by a different type of HPV.
This is a companion discussion topic for the original article at https://patient.info/sexual-health/sexually-transmitted-infections-leaflet/anogenital-warts