The wart-causing virus HPV is like any other germ. The wart virus loves warm, moist places like small cuts or scratches on your hands or feet. Once the virus finds a nice warm place on the skin, a wart begins to develop. Warts can grow for many months — sometimes a year or more — before they are big enough to see. So if you do get a wart, you may never know where you came into contact with HPV. If you touch a towel, surface, or anything else someone with a wart has used, you can pick up HPV. Kids who bite their fingernails or pick their nails get warts more often than kids who don't. That's why it's important to avoid picking, rubbing, or scratching a wart, whether it's on another person’s or on your own body.
Flat warts are also called juvenile warts, probably because kids get them more often than adults do. These warts are small and about the size of a pinhead. They're smoother than other kinds of warts and have flat tops. A flat wart may be pink, light brown, or yellow. Most kids who get flat warts have them on their faces, but flat warts can also grow on arms, knees, or hands. There can be as many as 100 flat warts all clustered together. Flat warts are cuased by a poxvirus.
Toad-ally untrue Myth
There is no truth in the old adage that says; “picking up a toad, gives you warts. So toad lovers everywhere — it is a toad-ally untrue myth that you can get warts from picking up a toad. Not even from the Warty Toad. We're not saying it's a good idea to tote toads around on a regular basis, but you won't get warts if you do so.