Genital warts are the most common viral sexually transmitted infection; it is caused by the HPV which can be passed on whilst having sex. Not everyone who has the virus develops the genital warts you can see.
Genital warts are caused by an infection of the skin around the genitals and anal area by the HPV. There are over 100 different types of HPV which can affect different parts of the body, including the hands and feet (a wart on the foot is called a verruca). Approximately 30 types of HPV can live in and around the genital and anal areas, but most genital warts are caused by just two types of virus (Types six and 11).
For most people, including those who have visible warts, the virus will be cleared from the body over time, (without any treatment). It is rare for genital warts to cause any long-term health problems.