Foot odor can be socially embarrassing, causing sufferers to search for a solution to the problem. Foot odor is caused by bacteria that grow on the feet. Different types of bacteria can produce different odors and symptoms, and knowing the cause makes effective treatment possible. When foot odor is unusual or foul, a medical professional should be consulted.
Normal Bacteria
When sweating occurs in enclosed shoes and combines with bacteria normally present on the feet, foot odor results. Dark, damp shoes are the perfect environment for bacterial growth. To reduce foot odor, the International Hyperhidrosis Society recommends washing the feet regularly with an antibacterial soap. Antiperspirants can be applied to the soles of the feet to reduce sweating. Wearing socks made of natural fibers, and changing the socks and shoes frequently, are recommended. Shoes that retain dampness and odor should be discarded. If these measures fail to reduce foot odor, a physician should be consulted.
Micrococcus Sedentarius
For 10 to 15 percent of the population foot odor is severe, according to Kid's Health from the Nemours Foundation. The cause may be Micrococcus sedentarius, a bacteria that overgrows on some people's feet. When combined with excess sweating, this bacteria produces strong-smelling sulfur compounds in addition to regular odor. The smell is similar to rotten eggs. In addition to recommendations for reducing normal foot odor, advises using an antibacterial soap to wash the feet, drying shoes in the sun and laundering sneakers, if possible. Plastic shoes should be avoided. If these measures are not successful, a doctor may prescribe a stronger antiperspirant or use other methods to decrease sweating, such as injecting botulinum toxin into the feet.
"Toxic Sock" Syndrome
"Toxic sock" syndrome, or pitted keratolysis, occurs when certain species of bacteria infect the superficial layer of the skin on the feet, according to "American Family Physician." These bacteria produce a very foul odor and secrete an enzyme that digests the top layer of the skin, creating small, shallow pits that are characteristic of the disorder. Pitted keratolysis is most common in athletes who spend long periods of time in footwear that does not allow air to circulate around the feet. Treatment consists antibiotics applied to the feet or taken by mouth. Because the foul odor typically never leaves shoes, they may need to be replaced.
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