The first thing to do is keep feet, socks, and shoes dry and clean. You might want to considered changing to clean socks more than one a day. You can buy topical drugs to treat the mail fungus in any drug store. If that does not work, you should see a doctor and get a prescription drug to kill or control the nail fungus. You can find more information here: http://www.livestrong.com/article/12469-nail-fungus/
