What can happen if you have internal genital warts that go untreated?

They spread: Genital warts are caused by the human papillomavirus, and they will spread further into the vagina/rectum, where they can cause irritation, bleeding and even potentially obstruction. In addition, they can actually develop malignant changes. They should be treated and you should be followed for any recurrences. If you are not using a condom during sex (whether active/passive) you must;see ur doc.