How did your grandfather get toenail fungus if he never had a pedicure?!  While there is the very slim possibility that you can acquire toenail fungus from a pedicure, most toenail fungus originates from foot fungus that is left untreated.  Since most people do not think that their dry skin is athletes foot, it goes untreated for years.  Over time, a small break in a nail or the nail bed allows fungus from your own foot to go into your toenails and cause toenail fungus.  

TRUTH: Toenail fungus comes from athletes foot you already had.