Viruses in the skin are responsible for the abnormal growth of skin cells that we call warts. While warts may not be visually appealing, they are quite harmless. However, depending on where they develop, they can sometimes be uncomfortable, particularly on the soles of the feet.
Warts usually disappear on their own without any treatment, although this may take as long as a couple of years. If the warts are uncomfortable, if they become infected or bleed, or if your child is self-conscious about them, talk to your doctor about treating and removing them. The pediatrician might recommend daily applications of a non-prescription salicylic-and-lactic acid solution on the wart; after a few months the wart might fall off. However, this kind of treatment is time-consuming and unpredictable. Warts can also be removed by surgery, freezing, or electrical cauterization.