Athlete’s foot is a common fungal infection affecting the skin of the feet. It can cause itching, scaling, and discomfort. Shoes are a significant factor in the persistence of athlete’s foot and can contribute to re-infection. Managing footwear is therefore important for treatment and prevention. Understanding how the fungus survives in footwear is important for maintaining foot health.
Fungal Persistence in Footwear
The fungi responsible for athlete’s foot can survive in shoes for extended periods, from weeks to months. These fungi thrive in warm, moist, and dark environments. The presence of sweat and lack of air circulation within shoes creates an ideal breeding ground for fungal growth.
Different shoe materials can influence how long the fungus persists. Synthetic materials like plastic and rubber tend to trap moisture and heat, creating a more favorable environment for fungal survival compared to more breathable natural materials such as leather or canvas. Shoes worn without socks or those that accumulate significant dirt and debris also provide a better environment for fungi to thrive.
Eliminating Fungus from Shoes
Several methods can decontaminate shoes. Antifungal sprays or powders designed for footwear can effectively kill lingering fungi. Apply these products thoroughly to the interior surfaces of the shoe and allow them to dry completely afterward.
UV shoe sanitizers use ultraviolet (UVC) light to destroy microorganisms. For machine-washable footwear and insoles, washing them regularly can help kill fungi. After washing, shoes should be dried completely, as any remaining moisture can promote fungal regrowth; owning multiple pairs allows for thorough drying between wears. For severe or recurring infections, or if shoes are difficult to clean, discarding old shoes may be necessary to prevent re-infection.
Minimizing Future Contamination
Proactive measures prevent shoes from becoming re-contaminated. Rotating shoes daily allows each pair to fully dry and air out between wears, which helps to eliminate the warm, moist conditions fungi prefer. Having several pairs of shoes supports this rotation.
Wearing moisture-wicking socks, made from materials like merino wool, bamboo, or certain synthetic blends, helps draw sweat away from the feet, keeping them dry. Cotton socks, conversely, can trap moisture and should be avoided. Practicing proper foot hygiene, such as thoroughly washing and drying feet daily, especially between the toes, should be done before putting on socks and shoes. Avoiding sharing shoes and socks with others also helps prevent the spread of fungal infections.