Warts

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 commonly seen on the bottom of the foot (planter wart), but can appear on the top. Children, teens, and people with allergies or weakened immune systems are more vulnerable to the wart virus.

Symptoms
Warts may appear spongy, with tiny red, brown or black spots. They can grow up to an inch or more across, occurring alone (solitary) or with smaller warts clustered nearby (mosaic). Warts are sometimes mistaken for corns or calluses. They can persist for years and recur in the same spot. If left untreated, warts can spread to other parts of the foot or even to the hands or other parts of the body.