Remedy for Itchy Heel and Flaky Skin Around Toes?

I tried using hydrocortisone, Vaseline, and baby oil, but withing hours the flakiness and/or itching begins again. What can I use that will work? It is mainly on one foot. No blisters, just a minor itch and lots of flaking especially on the underfoot, the top skin is fine.

By lblobogirl from Philadelphia, PA