A wart is an infection caused by a virus, which can invade your skin through small cuts or breaks. Over time, the wart develops into a hard, rough growth on the surface of the skin. A wart is most commonly seen on the bottom of the foot (plantar wart), but can also appear on the top.
Children, teens, and people with allergies or weakened immune systems are more vulnerable to the wart virus.
Note: Warts are contagious and therefore special precaution should be taken to prevent passing warts on to others.