Warts are small growths on the skin, usually harmless, caused by various strains of the human papillomavirus (HPV). This virus affects the outer layers of the skin, causing an abnormal ...

My abuelita told me that to get rid of warts all you needed to do is to pee on it. I had also heard that rubbing a potato or a penny on it will get rid of it, too. So which one is true?