By Barb Nefer
Flat warts are annoying, unsightly and even potentially painful. Knowing a little about them, including the causes, will help you avoid becoming infected by someone who already has them. A flat wart, also called a verruca plana, is a small growth on the skin. It is usually harmless and will normally disappear on its own. Most flat warts disappear within two years. Flat warts are usually small,...