Washing Your Feet With Vinegar and Salt: Why It’s Recommended and When to Actually Do It

A 20-minute soak in warm water mixed with vinegar is promoted across social media and lifestyle sites as a natural solution for foot odor, athlete’s foot, and dry skin. Some recipes add salt. The treatment relies on acetic acid, the active component in vinegar, which has demonstrated antimicrobial properties in laboratory (in vitro) settings.

The practice has gained enough popularity that medical and health information sites now publish detailed guidance on how to make a vinegar foot soak safely, and who should avoid it. For example, University Hospitals notes that vinegar may help reduce odor-causing bacteria due to its acidity. The core claims are consistent: vinegar soaks may reduce odor-causing bacteria, inhibit fungal growth, and soften rough skin through mild exfoliation.

But does vinegar actually kill fungus on your feet? And is it safe?

While the biological rationale is plausible, high-quality clinical evidence remains limited. Most support comes from laboratory data rather than randomized controlled trials in humans. What follows is a summary of what is known, what is not, and who should think twice before trying it.

What Vinegar Can and Cannot Do

The proposed benefits fall into three categories: odor control, fungal infections and skin softening. Each rests on a different level of evidence.

Odor control

Foot odor happens when bacteria break down sweat and release unpleasant compounds. Because acetic acid has antibacterial properties in laboratory studies, soaking may reduce the microbial population responsible for smell. University Hospitals includes vinegar soaks as an option for managing odor for this reason.

However, there are no large clinical trials specifically proving that vinegar eliminates bromodosis (medical term for foot odor). The benefit is biologically plausible, but not strongly studied in controlled human trials.

Fungal infections

For fungal infections such as tinea pedis (athlete’s foot), the evidence is weaker. Laboratory studies show acetic acid can inhibit fungal growth, but clinical evidence in people is limited. The American Academy of Dermatology recommends topical antifungal medication as first-line treatment for athlete’s foot rather than home remedies.

For mild athlete’s foot, a vinegar soak may offer supportive benefit, but it is not considered a proven cure. Daily soaks of 10 to 15 minutes are sometimes tried until symptoms improve, which may take two to three weeks or longer. If symptoms persist or worsen, medical treatment is recommended.

A 2020 laboratory study found distilled white vinegar effective against Sarocladium kiliense, a fungus found in soil that can cause skin infections. Whether this applies to dermatophytes such as Trichophyton rubrum, the most common cause of athlete’s foot, remains unproven.

Skin softening

The exfoliating effect of vinegar may help soften cracked skin and mild calluses. This is due to its mild acidity loosening dead skin cells rather than because of strong clinical evidence. Lukewarm water is recommended, as hot water can worsen dryness. Moisturizer should be applied immediately after soaking to support the skin barrier. Overuse may increase irritation or worsen dryness.

Who Should Avoid Vinegar Soaks

Medical guidance is clear about higher-risk groups.

People with diabetes should not self-treat foot conditions without medical supervision. Diabetes can cause peripheral neuropathy (reduced sensation) and impaired circulation, which slow healing and increase risk of foot ulcers. The U.S. National Institute of Diabetes and Digestive and Kidney Diseases advises professional care for diabetic foot problems rather than home remedies (NIDDK, “Diabetes & Foot Problems”).

Open wounds, cuts or deep cracks are absolute contraindications. Vinegar can cause burning and inflammation on broken skin and may delay healing. A 2015 case report in the Journal of Clinical and Aesthetic Dermatology documented chemical burns after vinegar was applied to skin lesions following internet-based instructions.

Those with eczema, highly sensitive skin or severe dryness should also proceed cautiously. A patch test on a small area is advisable before soaking both feet.

How to Make a Vinegar Foot Soak Safely

Medical sources generally recommend the following dilution:

• Fill a basin with one part vinegar to two parts warm (not hot) water
• Soak feet for 10 to 20 minutes
• Wash feet with soap before and after soaking
• Dry thoroughly, especially between toes
• Apply moisturizer afterward

Distilled white vinegar is most commonly used. The specific type of vinegar likely does not significantly change antimicrobial activity, but flavored or herbal vinegars should be avoided due to added ingredients.

Some online recipes include salt. There is no strong medical evidence that salt improves antifungal or antibacterial effects. It may provide mild exfoliation but is not necessary.

For general foot care, one or two soaks per week is typically sufficient. For mild fungal symptoms, daily short-term use may be tried, but signs of irritation, worsening dryness or spreading infection should prompt medical evaluation.

When to See a Doctor

Vinegar soaks are not a substitute for medical treatment. Seek medical advice if:

• Symptoms do not improve after several weeks
• Fungal infection spreads or becomes painful
• Redness, warmth, swelling or pus develops
• Cracking becomes severe
• You have diabetes or circulation problems

If symptoms worsen or spread, medical attention should be sought. A doctor can help develop a suitable treatment plan and advise on whether a vinegar soak may help.

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