Baking soda will not cure a yeast infection. It has some lab-proven ability to slow the growth of Candida, the fungus responsible for yeast infections, but it does not kill it. Antifungal medications, whether over-the-counter or prescription, remain the only proven treatment. That said, baking soda may offer temporary relief from external itching and burning, and in some cases, what seems like a stubborn yeast infection is actually a different condition that baking soda can treat.
What Baking Soda Does to Candida
Lab research shows that sodium bicarbonate (baking soda) is fungistatic, meaning it stops Candida from growing but doesn’t destroy it. In a 2025 study published in Heliyon, Candida albicans cells exposed to baking soda showed a 1.5x reduction in their normal growth rate, a 93% drop in the cells forming invasive filaments (the structures that help the fungus dig into tissue), and a 50% reduction in biofilm mass. Those are meaningful numbers in a petri dish.
The key distinction is fungistatic versus fungicidal. Baking soda puts the brakes on Candida; it doesn’t eliminate it. Once you stop using it, the fungus can resume growing. Antifungal medications actually kill the organism or stop it from reproducing permanently, which is why they resolve infections and baking soda alone does not.
Why Baking Soda Baths Can Feel Helpful
A lukewarm baking soda bath can soothe the external itching and burning that come with a yeast infection. Baking soda is mildly alkaline and can temporarily calm irritated skin on the vulva. For a full bath, 4 to 5 tablespoons of baking soda in lukewarm water with a soak of about 10 minutes is a commonly cited ratio. For a sitz bath (a shallow basin that covers just the pelvic area), 1 to 2 teaspoons in lukewarm water for 10 to 15 minutes is typical.
This is symptom management, not treatment. You’re easing the discomfort while the infection itself persists. And there’s a risk: if baking soda water enters the vaginal canal, it can raise the internal pH and disrupt the balance of protective bacteria. A healthy vagina sits at a pH of roughly 3.8 to 4.5, which is acidic enough to keep harmful organisms in check. Shifting that pH upward can actually make a yeast infection worse or invite bacterial vaginosis. The Office on Women’s Health specifically warns that douching with baking soda removes normal protective bacteria and can cause overgrowth of harmful organisms.
Baking Soda Baths vs. Antifungal Medication
Over-the-counter antifungal creams and suppositories, along with prescription oral antifungals, are the standard treatment for vaginal yeast infections. These medications target the fungal cell membrane directly, and most uncomplicated infections clear within a few days of starting treatment. Cleveland Clinic’s guidance is blunt: antifungal medications are the only proven way to treat a yeast infection, and home remedies risk drying out already-irritated tissue or disrupting vaginal flora.
If you want to use a baking soda sitz bath for comfort while you’re also using an antifungal, that’s a reasonable approach for external relief. Just avoid pushing baking soda solution inside the vagina through douching or direct application.
The Condition Baking Soda Actually Treats
Here’s where it gets interesting. Some people with what looks and feels exactly like a yeast infection, including thick white discharge, itching, and burning, actually have a condition called cytolytic vaginosis. This happens when Lactobacillus bacteria (the “good” bacteria) overgrow and make the vagina too acidic, breaking down the vaginal lining. The symptoms mirror a yeast infection so closely that many people are misdiagnosed and cycle through rounds of antifungal medication that never work.
Baking soda is the primary treatment for cytolytic vaginosis. Because the problem is excess acidity, raising the pH with baking soda directly addresses the cause. The typical approach involves baking soda suppositories (gelatin capsules filled with baking soda, inserted vaginally twice a week for two weeks) or baking soda douches on the same schedule. A common preparation is 1 to 2 tablespoons of baking soda dissolved in four cups of warm water.
If you’ve been treated for yeast infections multiple times and the symptoms keep coming back despite antifungal medication, cytolytic vaginosis is worth discussing with your provider. A simple microscopy exam can distinguish between the two: a yeast infection shows fungal organisms, while cytolytic vaginosis shows an abundance of Lactobacilli and fragments of broken-down vaginal cells with no yeast present.
How to Tell If It’s Really a Yeast Infection
Self-diagnosis of yeast infections is unreliable. Studies consistently show that people who assume they have a yeast infection are wrong roughly half the time. The classic symptoms of thick, white, odorless discharge with vulvar itching and burning can also indicate bacterial vaginosis, cytolytic vaginosis, or other conditions that require different treatments entirely.
Vaginal pH offers one quick clue. Yeast infections typically occur at a normal vaginal pH of around 4.0. Bacterial vaginosis pushes the pH above 4.5, and trichomoniasis usually above 5.4. Many pharmacies sell pH test strips, and while a normal result doesn’t confirm a yeast infection, an elevated result suggests something else is going on.
A yeast infection is classified as recurrent when you experience four or more confirmed episodes in a single year, or three or more episodes unrelated to antibiotic use. Recurrent infections need professional evaluation, including fungal cultures, because they may involve less common Candida species that don’t respond to standard treatments. Persistent symptoms despite antifungal therapy are also a signal that the diagnosis itself may be wrong.
The Bottom Line on Baking Soda
For a confirmed yeast infection, baking soda is not a substitute for antifungal treatment. It can slow fungal growth in laboratory conditions, and a sitz bath may ease external itching temporarily, but it won’t resolve the infection. The real value of baking soda lies in treating cytolytic vaginosis, a condition frequently mistaken for recurrent yeast infections. If antifungals haven’t worked for you despite multiple rounds, that distinction could be the answer you’ve been looking for.