Plantar warts are viral infections that commonly develop on the soles of the feet, where they can become flattened by the pressure of walking and develop an overlaying callous. They tend to be hard and flat, with a rough surface and well-defined boundaries. Warts may also appear on the top of the foot or toes, where they are then usually raised and fleshier.
Warts are often flesh-tone and have tiny black dots in the center. Unlike corns and calluses, plantar warts tend to bleed when debrided (removing overlying dead skin) due to the many small blood vessels present.