I read on a web site just a few days ago about this. Wash your feet and dry with a clean towel. When dry rub with stick deodorant bottoms, tops, and between toes. The person writing the article said it worked fine. Worth a try and it is inexpensive.
My girlfriend's son had this problem. It turned out he had a dairy allergy. When he cuts all dairy from his diet, the problem goes away. If his feet stink, his family knows he had some ice cream!
You may have athletes foot or some type of fungal or bacterial infection. I know a 5 year old girl that has the same problem. Even if she goes around barefoot in the house, the smell is huge problem. I would try seeing a doctor.
Maybe try some baking soda or cornstarch sprinkled into the shoes or sprinkle onto feet?
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