Foot odor and athlete's foot are common when you wear shoes that don't "breathe". Usually, if you take off your shoes, wash your feet, and put on clean socks, you can keep the athlete's foot and the odor away. Occasionally the problem continues despite your efforts. Persistent odor may mean a fungal infection. Athletes foot is a common infection that may cause foot odor. There are many nonprescription foot care products that may be used to treat Athlete's foot and foot odor. These foot care products include antifungal creams, shoe sprays and foot soaks & cleansers.