Warts are small growths that appear on the skin, and genitals, caused by a virus. They vary in type, size, appearance and location (genitals, penis, hands, feet), and are not usually painful. Warts are very contagious, spreading from person to person quite easily. Luckily, warts can be removed with liquid nitrogen or cryotherapy which freezes and eliminates them. In addition, laser therapy and surgery are also effective treatments. Genital warts require professional treatment by a doctor in your area as over-the-counter products should not be used.