text: It isn't the feet themselves.  It is moisture (sweat, not drying properly after a shower) that allows smelly bacteria to multiply.  It may also be a sign of an infection (bacterial or fungal) but that is usually accompanied by flaking skin, itching or yellowing nails and or discharge from the nail beds.  Dry feet (powdering helps) won't smell.  And keep shoes dry also.  Let them air out and if they are funky, Febreeze 'em.