The official term for any type of body odor from sweat, including the odor on your feet, is bromhidrosis. The cause of foot odor is moisture.
Required Reading
June 1, 2010
Summertime is here and that means it’s time for open-toed shoes and perfectly polished piggies. But not everybody looks forward to the time when shoes are optional. Some people prefer to keep their shoes on to cover their feet — and an unpleasant foot odor.