Tinea/athletes foot

or

Eczema


Buy some hodrocortisone cream and apply it twice a day twice a day, followed by spraying with an antifungal spray (Lotremin, Ting, Tinacidin etc)

After it looks better, keep spraying your feet with the antifungal once a day, and spray into your shoes once a day, for another 2 weeks, to make sure it is totaly gone

After it looks better, keep using the creams for a week to make sure it stays gone

If it doesnt respond, off to the doctor with you