Warts are soft tissue growths that can occur on anywhere on the skin, including the soles of your feet. A wart that develops on the bottom of your foot is called a plantar wart. Warts are usually not painful, although they can be if a plantar wart is located on the ball or heel of the foot.  How can you get a wart? All warts result from a viral infection of the skin caused by direct skin-to-skin contact. The virus, called Human Papillomavirus (HPV), enters the skin through a cut. The cut may be so small that it is invisible to the naked eye. Plantar warts are contracted in public places where people walk around barefoot like locker rooms, pools, gyms, and salons where foot care treatments such as pedicures are performed.