Wearing the same pair of socks more than once may seem harmless, but microbiology says otherwise. According to microbiologist Primrose Freestone, every pair of socks worn once can be loaded with millions of bacteria and fungi. Therefore, the recommendation is clear: change daily to reduce the risk of infections and bad smell.
The specialist explains that the feet function like a “microscopic tropical jungle”: They concentrate an enormous number of sweat glands and can harbor up to 1000 different types of microorganisms.
The warm and moist environment, especially between the fingers, encourages bacteria and fungi to feed on sweat and dead skin cells. Their waste is responsible for the characteristic smell of feet, socks and shoes.
By retaining sweat, tights make this environment even more conducive to the proliferation of microbes, and it has been proven that certain bacteria can survive on fabrics like cotton for up to 90 days if the garment is not washed. Studies cited by Freestone show that a pair of socks can concentrate between 8 and 9 million bacteria per sample after a single use. far above other clothing items such as T-shirts, which contain around 83,000 bacteria.
Among the microorganisms identified are common skin types, but also potential pathogens such as Aspergillus, Candida or Cryptococcus, which under certain conditions can cause respiratory or intestinal infections. Some specific bacteria such as Staphylococcus hominis and Staphylococcus epidermidis produce compounds that produce intense odors reminiscent of rotten onions or strong cheese.
The problem is not limited to the feet. Microbes present on used socks can easily be transferred to any surface they come into contact with: Shoes, beds, sofas or carpets. This increases the risk of spreading conditions such as athlete’s foot, a common and highly contagious fungal infection.
For this reason, the expert recommends that those who already suffer from athlete’s foot not to share socks or shoes and to avoid walking alone with socks or barefoot in changing rooms, showers and public toilets. He also recommends not wearing the same pair of shoes several days in a row and letting them air out completely so sweat can evaporate.
When it comes to hygiene, the microbiologist advises avoiding socks and shoes that promote sweating, washing your feet twice a day and, if necessary, using special antiperspirants that help limit the growth of bacteria. As for washing socks, experts point out that if there is not a very strong smell, Warm water and mild detergent may be sufficient. However, not all microorganisms are completely eliminated with this method.
For more effective disinfection, detergents with enzymes and washing programs with hot water are ideal: the enzymes release the microbes from the fabric and are destroyed by the high temperature. If you can only wash at a low temperature, ironing the tights with hot steam is an alternative to eliminate bacteria and fungal spores. including the fungus responsible for athlete’s foot.
Freestone also points to the existence of “antimicrobial” socks, which are made from materials containing metals such as silver or zinc and are able to reduce the bacteria responsible for bad smells. Another option is bamboo socks, which allow for better air circulation and promote sweat evaporation, preventing microbial growth. These alternatives could benefit from somewhat more extensive use, always depending on their effectiveness in controlling moisture and microbial load.
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