The most commonly recommended foot soak for fungus is a vinegar and warm water mixture, though several other household ingredients show antifungal properties worth considering. No foot soak alone is a reliable cure for stubborn nail fungus, but soaks can help with mild infections, early-stage athlete’s foot, and as a complement to other treatments.
Vinegar Soaks
White vinegar is the most widely recommended home soak for foot fungus. The acetic acid creates an environment that discourages fungal growth. Mix equal parts white vinegar and warm water (about one cup of each) and soak the affected area for 10 to 20 minutes, once or twice a day. Some sources suggest a milder ratio of one part vinegar to two parts water, which may be easier on sensitive skin.
Apple cider vinegar works the same way. There is no strong evidence that one type of vinegar outperforms the other. If you notice redness, stinging, or dryness, try the more diluted ratio or reduce your soak frequency to once daily. For athlete’s foot (the itchy, peeling skin between your toes), daily vinegar soaks should continue until symptoms clear. For nail fungus, expect to commit to weeks or months of consistent soaking before seeing any visible change.
Baking Soda Soaks
Baking soda (sodium bicarbonate) has genuine antifungal properties. A study published in Mycopathologia tested it against 70 fungal strains isolated from skin and nail infections and found that a concentration of 10 grams per liter inhibited 80% of all the fungal strains tested. When the researchers applied that same concentration to actual infected nail and skin samples, fungal growth was completely stopped in 79% of specimens and reduced in another 17%.
To make a baking soda foot soak, dissolve about two to three tablespoons in a basin of warm water. The exact dose doesn’t need to be precise for a home soak. Baking soda also helps absorb moisture, which matters because fungus thrives in damp environments. You can combine it with a vinegar soak on alternating days, though mixing them together in the same basin neutralizes both ingredients.
Tea Tree Oil
Tea tree oil is one of the few home remedies with clinical trial data behind it. In one trial comparing tea tree oil to a standard antifungal cream for nail fungus, tea tree oil produced an 18% cure rate after six months, slightly outperforming the prescription cream’s 11% cure rate. When combined with another antifungal agent in a cream formulation, a 5% tea tree oil blend achieved an 80% clinical cure rate.
For a foot soak, add 10 to 15 drops of tea tree oil to a basin of warm water. The oil won’t fully dissolve, so swirl it around before soaking. Tea tree oil can irritate skin at full strength, so never apply it undiluted directly to your feet. Soaking for 10 to 15 minutes daily is a reasonable routine. The active compounds (primarily a group of chemicals called terpenes) disrupt fungal cell membranes, and the oil also helps soothe itching and inflammation.
Listerine Soaks
Listerine foot soaks are a popular home remedy, and the logic is straightforward: the mouthwash contains several essential oils with documented antifungal properties. Thymol (from thyme) is antibacterial and antifungal. Eucalyptol (from eucalyptus) reduces inflammation. Menthol provides a cooling, anti-itch effect that can relieve the discomfort of athlete’s foot. Methyl salicylate, another active ingredient, may help the skin absorb the other compounds more effectively.
To try it, pour enough original (amber-colored) Listerine into a basin to cover your feet, or mix it with equal parts warm water or vinegar. Soak for 15 to 20 minutes. No clinical trials have tested this specific use, so the evidence is anecdotal, but the individual ingredients do have confirmed antimicrobial activity.
Epsom Salt
Epsom salt (magnesium sulfate) is often suggested for foot soaks, but its role in treating fungus is indirect. It does not kill fungus on contact. What it does well is soften thickened skin and nails, making it easier for antifungal treatments to penetrate. Cleveland Clinic recommends Epsom salt as a soak additive that helps prevent fungal and bacterial growth, and it pairs well with other active ingredients like tea tree oil or vinegar.
Dissolve half a cup of Epsom salt in a basin of warm water and soak for five to seven minutes. Dry your feet thoroughly afterward, especially between the toes. Think of Epsom salt as a supporting player rather than a standalone treatment.
What to Skip: Hydrogen Peroxide
Hydrogen peroxide is sometimes recommended online, but there is no research showing it helps treat foot fungus. The common household concentration of 3% can cause skin irritation and may actually delay healing of any cracked or broken skin around the infection. One study found that hydrogen peroxide combined with iodine could inhibit fungal growth in a lab setting, but this hasn’t been tested on athlete’s foot or nail fungus in real patients. You’re better off with the options above.
How Home Soaks Compare to Medications
It’s worth being realistic about what foot soaks can and can’t do. For athlete’s foot (a surface skin infection), home soaks often provide meaningful relief within a couple of weeks. Nail fungus is a different challenge entirely. The fungus lives underneath the nail plate, and soaking alone struggles to reach it.
For context, the strongest oral antifungal medications achieve cure rates of 70 to 81%. Prescription nail lacquers cure about 5.5 to 8% of cases on their own. Tea tree oil’s 18% cure rate in one trial puts it in a similar range to some prescription topical options. A mentholated chest rub (like Vicks VapoRub), applied daily, achieved complete clearance in 38% of patients in one review, making it one of the more effective over-the-counter approaches.
The takeaway: soaks work best for mild or early-stage infections, and for athlete’s foot specifically. For nail fungus that has been present for months or has spread to multiple nails, soaks alone are unlikely to resolve it. They can still be useful alongside other treatments, particularly to soften nails and keep the surrounding skin healthy.
How to Get the Most From Your Soak
Whichever soak you choose, a few practices make a real difference. Dry your feet completely after every soak, using a clean towel and paying attention to the spaces between toes. Fungus feeds on moisture, so leaving feet damp after a soak can work against you. Use a fresh towel each time and wash it in hot water.
Trim thickened nails short before soaking so the liquid can reach more of the infected area. If you’re applying a topical antifungal cream or ointment, do it right after soaking while the skin and nail are still soft. This improves absorption significantly.
Consistency matters more than which soak you pick. Daily soaking for several weeks is the minimum commitment for any visible improvement in nail fungus. For athlete’s foot, you may see results faster, but continue soaking for a few days after symptoms disappear to reduce the chance of recurrence.
A Caution for People With Diabetes
If you have diabetes, the CDC advises against soaking your feet at all. Diabetes often causes nerve damage that reduces sensation in the feet, meaning you may not notice if water is too hot or if skin is becoming irritated. Prolonged soaking can also soften skin to the point where it breaks down, creating an entry point for infection. Wash your feet daily in warm (not hot) water, but skip the extended soaks and talk to your care team about antifungal options that are safer for you.