Published on Saturday, January 2, 2010 by admin Plantar warts affecting the foot and toe. This problem is caused by a viral infection called Human Papillomavirus (HPV). This virus is contagious and spreads through skin-to-skin contact. Although plantar warts disappear after some time even without treatment, however, will be very little pain and discomfort. You should go for treatment of plantar warts if you have a ...