Plantar warts are actually a viral infection type of disease, mainly in the foot of the common warts, hands long actually also called common warts, for common warts, at present the main use of liquid nitrogen for cryotherapy, is to use – 196 degrees nitrogen, direct action to the lesion tissue, so that the warts freeze and thaw, blistering, and gradually dry up, scabs. For small warts on the hands of a single treatment can be, for large often need multiple treatments. And, be careful not to pick and squeeze these warts, because it is a viral infection, it is easy to infect and cause multiple viral rashes on the hands.