Warts are caused by a group of viruses called human papilloma virus of which there are many subtypes. Contrary to what many people believe, warts do not have “roots”. Warts will almost always go away over time but treatment is recommended so that the warts do not continue to spread. Liquid nitrogen treatment is preferred because it is cost effective and scarring is very rare. Other treatments include cautery, excision, topical gels and laser. If your warts disappear with one treatment you are lucky. Most warts require multiple treatments. To the best of our knowledge, there is no way to prevent warts.