Fungal infections are extremely common, accounting for over 9 million outpatient medical visits per year in the United States alone. The good news is that most of these infections, from athlete’s foot to yeast infections to ringworm, are preventable with straightforward habits. The core principle is simple: fungi thrive in warm, moist environments, so your main job is to deny them those conditions on your skin, in your home, and in the spaces where you spend time.
Keep Your Skin Clean and Dry
Moisture is the single biggest factor that lets fungi take hold. After showering, bathing, or sweating, dry your skin thoroughly, paying attention to areas where skin folds trap moisture: between your toes, under your breasts, in the groin, and in armpit creases. These warm, damp pockets are where infections like jock itch, athlete’s foot, and yeast infections typically start.
Clothing choices matter more than most people realize. Wear breathable fabrics, especially underwear made of cotton, and avoid tight-fitting clothes that trap heat and sweat against your skin. Change your socks at least once a day, and more often if they get wet. Change your underwear daily as well. If you’re prone to sweating, consider moisture-wicking fabrics for socks and workout gear.
Choose the Right Footwear
Your feet are one of the most vulnerable spots for fungal infections because they spend hours enclosed in shoes. Shoes made from synthetic materials like plastic and rubber are more likely to cause sweating, so opt for shoes that allow airflow when possible. Alternate the shoes you wear each day so each pair has time to dry out completely before you put them on again. Wet or damp shoes are an ideal fungal breeding ground.
In public spaces like locker rooms, pool decks, and communal showers, always wear shower shoes or flip-flops. Both the CDC and the American Podiatric Medical Association confirm that wearing footwear in these environments is a proven way to protect your feet from the fungi that cause athlete’s foot. Rinse your shower shoes with clean water after each use so they don’t become carriers themselves.
Personal Items Stay Personal
Fungi spread easily through shared objects. Don’t share towels, clothing, sheets, razors, or hairbrushes with other people. This is especially important in households where someone already has a fungal infection like ringworm. Keep your fingernails and toenails clipped short and clean, since fungi can settle under nails and become difficult to treat once established.
Laundry That Actually Kills Fungi
Regular laundry cycles don’t necessarily eliminate fungal spores. For hot-water washing to be effective, the water needs to reach at least 160°F (71°C) and stay at that temperature for a minimum of 25 minutes. Most home washers set to “hot” don’t get that high.
If you wash at lower temperatures, adding bleach makes a significant difference. Chlorine bleach is a broad-spectrum germicide that enhances the disinfecting power of the wash cycle. Oxygen-based bleach (like OxiClean) also works. For towels, socks, underwear, and bedding used by someone with an active infection, one of these additions is worth incorporating into your routine.
Protecting Yourself at the Gym
Gym equipment, especially mats and benches, can harbor both bacterial and fungal organisms. Studies sampling gym mats have consistently found ringworm-causing fungi alongside bacteria. Wipe down any mat or bench before and after use with the disinfectant wipes your gym provides. No single disinfectant has been identified as clearly superior for this purpose, so using whatever your facility stocks is better than using nothing.
After your workout, shower as soon as you can and change into dry clothes. Sitting in sweaty gym clothes, even for an hour or two, gives fungi a head start. If you use a communal shower, wear your flip-flops.
Preventing Yeast Infections
Vaginal yeast infections have their own set of triggers. Cotton underwear and loose, breathable clothing help keep the area dry. Avoid sitting in wet swimsuits for extended periods. If you use inhaled corticosteroids for asthma or another condition, rinse your mouth or brush your teeth afterward, since these medications can promote oral thrush by suppressing the immune environment in your mouth and throat.
There’s a popular belief that cutting sugar from your diet prevents yeast overgrowth. The connection isn’t as direct as it sounds for most people. What is well established is that elevated blood sugar, particularly in people with diabetes, creates conditions where Candida yeast can flourish. If you have diabetes, keeping your blood sugar within your target range is one of the most effective things you can do to protect yourself from fungal infections, not just yeast infections but more serious invasive ones as well.
Pets Can Spread Ringworm
Ringworm isn’t caused by a worm. It’s a fungal infection, and pets are a common source. Dogs and cats can carry ringworm-causing fungi, sometimes without showing obvious symptoms. If your pet develops patchy hair loss, scaly skin, or crusty spots, take them to a veterinarian promptly.
While handling a pet with ringworm, wear gloves and long sleeves. Wash your hands with soap and running water after any contact. Vacuum areas where the pet spends time regularly, and disinfect hard surfaces with diluted chlorine bleach (a quarter cup per gallon of water) or a strong detergent. Have any other pets in the household checked too, since the fungus spreads easily between animals before jumping to humans.
Control Humidity in Your Home
The air in your home plays a role in fungal prevention that’s easy to overlook. The EPA recommends keeping indoor humidity between 30 and 50 percent, and never above 60 percent. Humidity above 60 percent leads to condensation on surfaces, which promotes mold growth on walls, ceilings, window frames, and fabrics. Use a dehumidifier in damp basements or during humid seasons, run exhaust fans in bathrooms and kitchens, and fix any water leaks promptly. A simple hygrometer (available for under $15) lets you monitor your home’s humidity levels.
Extra Precautions for Higher-Risk Groups
Some people face a much higher risk of fungal infections. This includes people with diabetes, those taking immunosuppressive medications, people undergoing chemotherapy, and anyone with a weakened immune system. For these groups, everyday fungal exposures that a healthy immune system would handle easily can lead to stubborn or even dangerous infections.
If you have diabetes, blood sugar management is your frontline defense. Your immune system functions less effectively when blood sugar runs high. Be aware that illness itself can raise blood sugar, creating a cycle where infection and elevated glucose feed each other. Monitor your levels closely during any illness.
Staying current on vaccinations also matters. While vaccines don’t target fungal infections directly, preventing illnesses like the flu or pneumonia means your immune system isn’t depleted and vulnerable when it encounters fungi. Good hand hygiene, including frequent washing with soap or an alcohol-based sanitizer, is especially important if you spend time in healthcare settings or have a central venous catheter.
Daily Habits That Add Up
Most fungal prevention comes down to a short list of consistent habits: dry your skin after getting wet, wear breathable fabrics, rotate your shoes, clean shared surfaces, keep your nails trimmed, and don’t share personal items. In communal wet areas, wear sandals. At the gym, wipe equipment down. At home, manage humidity and wash towels and bedding regularly with hot water or bleach. None of these steps is dramatic on its own, but together they make your skin a much less hospitable place for fungi to colonize.