Warts are small, usually painless growths on the skin caused by a virus called human papillomavirus (HPV). They are generally harmless. However, warts can be disfiguring and embarrassing, and occasionally they itch or hurt (particularly on the feet). The different types of warts include: Common warts: Usually found on fingers, hands, knees, and elbows. These are dome-shaped of grayish-brown color...