TREAT TINEA PEDIS. Severe foot odor may be coming from a common condition, tinea pedis (athlete's foot). Usually your feet exhibit cracking, peeling, red skin between the toes or on the feet. Many over-the-counter remedies are available including Lamisil (terbinafine) cream (generic works, too) and anti-fungal powders may help.
Lots of work. There is a chance that your feet have an infection, but unlikely without diabetes and other health disorders to have simultaneous infections. I'd recommend at least washing your feet daily, talcum powder in your sox to dry up sweat, and changing sox at least daily. These three measures should help.