Athlete’s foot is preventable. The fungus that causes it thrives in warm, moist environments and spreads through direct contact with infected skin or contaminated surfaces. Keeping your feet dry, choosing the right footwear, and being careful in shared spaces will dramatically cut your risk.
How the Fungus Spreads
Athlete’s foot is caused by dermatophytes, a group of fungi that feed on keratin in your skin. They spread in two main ways: direct contact with an infected person’s skin (or the skin flakes they shed) and indirect contact with contaminated objects like shoes, socks, towels, and floors. Transmission between family members is the most common route, with children often picking it up from infected skin fragments shed around the house.
The fungus doesn’t just live on feet. Once established, it can spread to your toenails, groin, hands, and face. One study found that nearly half (47%) of patients with athlete’s foot had the fungus living inside their shoes, which means reinfection is a real problem even after treatment if you don’t address your footwear.
Keep Your Feet Dry Every Day
Moisture is the single biggest factor that lets this fungus take hold. The CDC recommends washing your feet daily and drying them completely, paying special attention to the spaces between your toes. Those toe webs trap moisture and create the exact warm, damp environment dermatophytes love. A quick towel-off after a shower isn’t enough. Separate each toe and dry deliberately.
Change your socks at least once a day. If you exercise or your feet sweat heavily during the day, change them more often. Sitting in damp socks for hours is one of the fastest ways to create conditions for infection.
Choose the Right Socks and Shoes
Cotton socks absorb sweat and hold it against your skin, which promotes both fungal and bacterial growth. Synthetic moisture-wicking fabrics pull sweat away from the foot and dry faster. In cooler weather, wool is an excellent choice because it can absorb up to a third of its weight in water vapor before it even feels wet, keeping your skin surface drier than cotton would.
For shoes, look for breathable materials with mesh panels that allow airflow. Tight-fitting shoes increase friction and trap heat, both of which encourage fungal growth. Your shoes should have enough room that your toes aren’t compressed together, since that presses the toe web spaces closed and locks in moisture.
Rotating between at least two pairs of shoes is one of the simplest prevention strategies. After wearing shoes for a full day, they need 24 hours or more to dry out completely. Wearing the same pair day after day means you’re sliding your feet into a still-damp environment every morning.
Protect Your Feet in Public Spaces
Gym showers, pool decks, and locker room floors are high-risk surfaces. The warm, wet conditions are ideal for fungal survival, and dozens of people walk through barefoot every day. Always wear flip-flops or shower shoes in these areas. This simple barrier between your skin and the floor prevents the vast majority of contact with fungal spores. The same goes for hotel bathrooms and communal changing areas.
Wash Socks and Towels at the Right Temperature
Here’s a detail most people miss: a normal warm wash cycle doesn’t kill the fungus. Research published in the Journal of Fungi found that washing contaminated fabric at 40°C (104°F, a typical warm setting) left dermatophyte spores fully viable. They grew back within days. Washing at 60°C (140°F) eliminated the spores completely. Interestingly, the detergent itself made no difference. It was the water temperature alone that determined whether the fungus survived.
If your washing machine has a “hot” or “sanitize” setting, use it for socks, towels, and bed linens, especially if anyone in your household has an active infection. If your machine doesn’t reach 60°C, running items through a hot dryer cycle adds an extra layer of protection.
Don’t Share Personal Items
Sharing towels, shoes, socks, or even bed linens with someone who has athlete’s foot is a direct route to infection. This applies even when the other person’s symptoms seem mild or are between flare-ups, because the fungus can live on surfaces and shed skin long after visible symptoms fade. Each family member should have their own towels and footwear, and shared bath mats should be washed frequently at high temperatures.
Consider Antifungal Powders or Sprays
If you’re regularly in high-risk environments (gyms, pools, shared housing), a preventive antifungal powder or spray can provide an extra layer of protection. In a controlled study of 16 athletes at risk for infection, daily application of an antifungal spray powder to one foot significantly reduced moisture in the toe web skin and inhibited fungal growth compared to the untreated foot. The effect was measurable after just three weeks of use.
Apply powder or spray to clean, dry feet before putting on socks, focusing on the spaces between your toes. Some people also dust powder inside their shoes. These products don’t replace good hygiene habits, but they reduce your risk when combined with the basics.
Disinfect Your Shoes
Because nearly half of athlete’s foot patients carry the fungus in their shoes, keeping the inside of your footwear clean matters. Letting shoes air out between wears is the minimum. For more active disinfection, products containing antifungal agents (like those with clotrimazole) applied to the shoe interior have been shown to reduce the microbial load inside athletic shoes. The key is applying them to dry shoes before you wear them, pressing the product into the interior for about 10 seconds and covering the whole inside surface.
UV shoe sanitizers are another option. Whatever method you choose, the goal is the same: don’t let your shoes become a reservoir that reinfects your feet day after day.
Who Needs to Be Extra Careful
Some people are more susceptible than others. You’re at higher risk if you sweat heavily, wear enclosed shoes for long hours, or frequently use public showers and pools. People with weakened immune systems, including those with diabetes, face not only a higher infection risk but also a greater chance of complications. A fungal skin infection that would be a minor nuisance for most people can progress to a serious bacterial skin infection called cellulitis in someone with compromised immunity.
If you fall into any of these categories, the prevention steps above aren’t optional extras. They’re worth building into your daily routine: dry feet, clean socks, rotated shoes, and protective footwear in shared spaces.