The human papilloma virus is responsible for warts - but to get them you have to be both genetically predisposed and in close contact with an infected person.
With a clean nail file, gently slough off the top layers of your warts daily to remove dead skin, says Day. (Do not use this nail file for anything but wart removal.) Then rub on over-the-counter Occlusal HP - its highly concentrated salicylic acid dissolves warts. If warts remain after several months, consult your dermatologist about other remedies, including laser therapy and liquid nitrogen treatments. Despite treatment, however, warts can come back. A warning: Be careful when engaging in sexual activity - though it's unlikely, hand warts can spread to your (or your partner's) genitals.