Warts are overgrowths of skin tissue caused by viruses.
They sometimes go away on their own, but they may stay the same, spread, or become irritated. Warts are classified according to their appearance and location. These are tiny, clotted blood vessels. These are usually on the face, neck, forearms, hands, or fingers and are flesh-colored or tan, small and flat. They are called common warts when another name is not more descriptive.