might be a fungal infection too. Leads to stinky feet, after showering rinse with diluted vinegar, 1tbl to 1 quart or so, maybe a little more or pee on your feet after you wash all the soap down the drain (DW won't like that.) Soap is basic and leaves your skin alkaline. Your skin is designed to be slightly acidic. Urine and vinegar are acidic. Plagarized advice from my old country doctor.

-w
(he who once had smelly feet, not so much anymore)