Greetings.Warm moist environment of the feet in shoes with sweat,dead skin debris and skin oils are fertile grounds for bacteria of the corynebacterium and micrococcus species .These bacteria act on the sweat and cause smelly feet.Some easy methods of foot hygiene may help reduce the smell and sweating.These will include-
1.Rotating your shoes by wearing other shoes on alternate days allows them to dry out.Removing the insoles will help them dry out faster.Keeping the shoe in a dry,cool environment with adequate UV light will eliminate any remnant bacteria.
2.Avoid synthetic material like nylon or rubber, wear only leather or cloth shoes which will absorb moisture.Go barefoot in the house for some time allowing the feet to dry and be aired.
3.Frequent change of socks and using a drying agent like a foot powder/corn starch will help.Antifungal
dusting powder may also help.
4.Wash and dry the feet twice daily using a antibacterial soap.Applying Topical benzoxl peroxide 5% may help.Topical antibiotic solution like erythromycin
may also help.
In case the sweating of the feet does not respond to these measures ,use of surgical excision of the sympathetic ganglion to reduc ethe sweating and other measures may be needed.Your doctor can guid eyou further.