Small warts caused by a viral infection at the conjunction of mucous membrane and skin around the anus, vulva and penis. They can spread to the vagina, and they grow rapidly in a warm, moist environment. The infection can be transmitted by sexual intercourse and is thus a venereal disease to a certain extent. In women there is often vaginal discharge, itching, and pain during sexual intercourse. Men experience almost no physical symptoms. The warts can disappear spontaneously, but usually action is taken before this. If there are only a few warts they can be painted with corrosive fluid, but there are usually too many for this, and they have to be removed by burning or freezing (cauterization).