The smell that comes with athlete’s foot isn’t actually caused by the fungus itself. It’s produced by bacteria that thrive in the same warm, moist environment between your toes. Getting rid of the odor means attacking both the fungal infection and the bacterial overgrowth simultaneously, while cutting off the moisture that feeds them.
Why Athlete’s Foot Smells
The fungus responsible for athlete’s foot creates soggy, macerated skin between your toes, which becomes a perfect habitat for odor-producing bacteria. Species like Brevibacterium epidermidis colonize this damaged skin and produce methanethiol and other sulfur compounds as metabolic byproducts. These are the same types of chemicals responsible for the smell of certain aged cheeses. The worse the bacterial overgrowth gets, the stronger the smell, and interestingly, the bacteria actually suppress the fungus in severe cases, which is why the worst-smelling infections sometimes test negative for fungal organisms.
This means the smell won’t go away until you do two things: treat the fungal infection so your skin can heal, and reduce the bacterial load and moisture that drive odor production.
Treat the Fungal Infection First
Clearing the underlying infection is the single most important step. Without it, your skin stays broken down, bacteria keep colonizing, and the smell returns no matter how much you wash.
Over-the-counter antifungal creams are the standard starting point, but not all are equally effective. In a head-to-head trial published in the BMJ, terbinafine 1% cream applied twice daily for just one week achieved a 97% fungal cure rate at six weeks. Clotrimazole 1% cream, another common option, required four weeks of twice-daily application and still only reached an 84% cure rate over the same period. If you want the fastest path to clear skin and less smell, terbinafine is the stronger choice.
Whichever you use, apply it to clean, fully dry feet. Spread it beyond the visible rash by about an inch in every direction, and finish the full course even if symptoms improve early. If the infection hasn’t responded after two weeks of treatment, it’s worth seeing a doctor for a prescription-strength option.
Vinegar Soaks to Lower Skin pH
A diluted vinegar soak can help shift the skin’s pH to make it less hospitable to both fungi and odor-causing bacteria. Mix one part vinegar (white or apple cider) with two parts warm water, and soak your feet for up to 20 minutes. You can do this daily while treating an active infection.
Vinegar soaks work best as a complement to antifungal treatment, not a replacement. They help manage odor in the short term while the medication does the heavier lifting against the infection itself. If you have cracked or open skin, the soak will sting, so skip it until those areas start to close.
Keep Your Feet Aggressively Dry
Moisture is the fuel for everything causing the smell. After every shower or soak, dry between each toe individually with a clean towel. A hair dryer on a cool or low-heat setting works even better for reaching the tight spaces between toes where water likes to hide. This step alone makes a significant difference because bacteria and fungi both need moisture to reproduce.
During the day, if your feet sweat heavily, changing socks midday can cut moisture exposure in half. Keep a fresh pair in your bag or desk drawer. Applying an antifungal powder or spray to your feet before putting socks on adds another layer of moisture control and helps suppress fungal regrowth.
Choose the Right Socks
Cotton socks are one of the most common contributors to foot odor during an athlete’s foot infection. Cotton absorbs moisture and holds it against your skin, creating exactly the warm, damp conditions that bacteria love. Switch to socks made from merino wool, acrylic, or polyester blends, all of which wick moisture away from the skin and dry faster. Some athletic socks also incorporate antimicrobial fibers that actively inhibit bacterial growth.
Wear a clean pair every day without exception. If you exercise, change into fresh socks immediately afterward rather than letting sweat sit against healing skin.
Disinfect Your Shoes
Your shoes harbor fungal spores that can reinfect your feet and restart the entire cycle of damaged skin, bacterial overgrowth, and odor. Fungal spores are surprisingly hardy. Research has shown that even machine heat drying for over two hours fails to kill dermatophyte spores unless temperatures reach at least 60°C (140°F), which most household dryers don’t achieve.
More effective options include:
- UVC sanitizing devices: Shoe-shaped UV inserts reduced fungal burden by up to 85% in contaminated shoes, and specific UVC wavelengths fully inhibited the most common athlete’s foot fungus.
- Antifungal sprays: Terbinafine 1% spray applied directly to shoe insoles is effective against the same organism.
- Ozone generators: Ozone gas fully eliminated the fungus after just two minutes of exposure, though these devices are less commonly available.
At minimum, spray the insides of your shoes with an antifungal spray after each wear and let them air out completely before wearing them again.
Rotate Your Footwear
No shoe dries fully overnight when worn daily, especially closed-toe athletic shoes or work boots. Rotating between at least two pairs gives each one a full 24 to 48 hours to air out. This alone significantly reduces the moisture level inside the shoe by the time you put it back on. If possible, remove the insoles and stand them upright to speed drying. In humid climates, stuffing shoes with newspaper or using a cedar shoe tree helps pull moisture out faster.
Open-toed shoes or sandals, when practical, give your feet airflow that closed shoes can’t match. Wearing them at home or on weekends gives your skin time to stay dry and heal.
When the Smell Signals Something Worse
A persistent foul odor that doesn’t improve with treatment, especially paired with increasing redness, warmth, swelling, or pus, can indicate a secondary bacterial infection that has moved beyond the skin surface. Cellulitis, a deeper skin infection, shows up as spreading redness and pain, sometimes with fever. Red streaks extending up from your foot toward your leg suggest lymphangitis, an infection of the lymphatic vessels that needs prompt medical attention. These complications are more common in people with diabetes, weakened immune systems, or poor circulation, but they can happen to anyone who leaves a severe infection untreated.