The feet and hands contain more sweat glands than any other part of the body, with roughly 3,000 glands per square inch. Smelly feet are not only embarrassing, but can be physically uncomfortable as well.
Feet smell for two reasons: 1) shoe wear, and 2) sweating of the feet. The interaction between the perspiration and the bacteria that thrive in shoes and socks generates the odor. Therefore, any attempt to reduce foot odor has to address both sweating and footwear.
Smelly feet or excessive sweating can also be caused by an inherited condition, called hyperhidrosis, which primarily affects men. Stress, some medications, fluid intake, and hormonal changes also can increase the amount of perspiration our bodies produce.
In general, smelly feet can be controlled with a few preventive measures:
Always wear socks with closed shoes.
Avoid wearing nylon socks or plastic shoes. Instead, wear shoes made of leather, canvas, mesh, or other materials that let your feet breathe.
Bathe feet daily in lukewarm water, using a mild soap. Dry thoroughly.
Change socks and shoes at least once a day.
Check for fungal infections between toes and on the bottoms of your feet. If any redness or dry, patchy skin is observed, get treatment right away.
Don't wear the same pair of shoes two days in a row. If you frequently wear athletic shoes, alternate pairs so that the shoes can dry out. Give your shoes at least 24 hours to air out between wearings; if the odor doesn't go away, discard the shoes.
Dust your feet frequently with a nonmedicated baby powder or foot powder. Applying antibacterial ointment also may help.
Practice good foot hygiene to keep bacteria levels at a minimum.
Wear thick, soft socks to help draw moisture away from the feet. Cotton and other absorbent materials are best.
Treating Foot Odor
The best home remedy for foot odor is to soak feet in strong black tea for 30 minutes a day for a week. The acid in the tea kills the bacteria and closes the pores, keeping your feet dry longer. Use two tea bags per pint of water. Boil for 15 minutes, then add two quarts of cool water. Soak your feet in the cool solution. Alternately, you can soak your feet in a solution of one part vinegar and two parts water.
Persistent foot odor can indicate a low-grade infection or a severe case of hereditary sweating. In these cases, a prescription ointment may be required to treat the problem.
Treating Excessive Sweating
A form of electrolysis, called iontophoresis, has been shown to reduce excessive sweating of the feet. However, it is more difficult to administer. In the worst cases of hyperhidrosis, a surgeon can cut the nerve that controls sweating. Recent advances in technology have made this surgery much safer, but may increase sweating in other areas of the body.