Warts can appear as tiny bumps covered with hard skin on the bottom of your foot, or sometimes they can be at the tips of your toes or in between your toes.  It may or may not hurt, depending on its site.  Often you may see an interruption in skin lines, and what appear to be tiny black dots in the middle of it which are blood vessels that grow in the middle of it.  However, it may also be an area of hard, dried skin that may not be a wart but instead a corn or a callus.  Either way, it is important to come in for a proper diagnosis and treatment plan to solve your discomfort in no time.