Warts is A small, fleshy bump on the skin or mucous membrane caused by human papillomavirus. Warts are caused by various strains of human papillomaviruses. Different strains may cause warts in different parts of the body. Warts can be spread from one location on the body to another or from person to person by contact with the wart. The main symptom is a fleshy, painless growth on the skin. Common areas affected include the hands, feet, and genitals. Treatment may include topical medications and removal through medical procedures.