The measures with the best evidence are simple: keep things cool and dry (breathable cotton underwear, prompt changes out of wet or sweaty clothes), skip douches and scented products, control blood sugar if you're diabetic, and use antibiotics only when you truly need them. Probiotics are a low-risk maybe, not a proven fix — and for some women, yeast infections simply aren't fully preventable.
If you've had a yeast infection, the obvious next question is how to avoid the next one. The honest answer is that a handful of habits genuinely tilt the odds in your favor — and a long list of popular "remedies" do nothing at all, or actively make things worse.
It helps to sort prevention advice by how much evidence stands behind it. Some steps are well supported and worth building into your routine. Others are plausible but unproven. And a few persistent myths are worth dropping entirely — some of them not just useless but genuinely irritating to delicate tissue. Here's where each one lands, and why.
What actually helps
Yeast (Candida) thrives in warm, moist, low-air environments, and it overgrows when the vagina's normal balance gets disrupted. Most of the genuinely useful prevention measures follow directly from those two facts — keep the area cool and dry, and avoid things that throw the balance off.
- Choose breathable underwear. Cotton lets moisture escape; tight, synthetic, or non-breathable fabrics trap heat and damp against the skin. You don't need to overhaul your wardrobe — just avoid sitting for long stretches in clothing that doesn't breathe.
- Change out of wet things promptly. Don't linger in a wet swimsuit or sweaty workout clothes. A warm, damp layer is close to ideal conditions for yeast to multiply.
- Skip douches and scented products. Douches, vaginal sprays, scented washes, and bubble baths strip away the protective bacteria that normally keep Candida in check. The vagina cleans itself; wash only the external area with mild, unscented soap and water.
- Keep blood sugar controlled if you're diabetic. High glucose feeds yeast and makes infections both more frequent and harder to clear. Good diabetes management is one of the more powerful levers you have.
- Use antibiotics only when they're genuinely needed. Antibiotics clear protective vaginal bacteria along with whatever they're targeting, which gives yeast an opening. That doesn't mean refusing antibiotics you actually need — it means not pressing for them when they won't help, like for a viral cold. If you reliably get a yeast infection after a course of antibiotics, ask a clinician about taking a preventive antifungal alongside them.
A few popular tweaks land in a gray zone. Wiping front to back and changing pads or tampons regularly are sensible hygiene either way, though the evidence tying them specifically to fewer yeast infections is modest. What matters more than any single rule is the overall pattern: keep the area cool, dry, and undisturbed, and don't strip away the bacteria that protect you.
None of these are dramatic. That's the point — prevention is mostly small, consistent choices that keep the local environment inhospitable to overgrowth. If you understand why infections keep coming back, the logic behind each habit becomes a lot clearer.
Where the evidence is thin
Probiotics are the most common "preventive" people ask about — oral capsules or vaginal products containing Lactobacillus, the bacteria that dominate a healthy vagina. The idea is biologically reasonable: restore the protective bacteria, crowd out the yeast. In practice, the research is limited and inconsistent, and the best summaries conclude there isn't strong evidence that probiotics meaningfully prevent or treat yeast infections.
Probiotics are a low-risk thing to try, not a proven fix. If they helped much, the studies would show it more clearly than they do.
— John Venzor, DO
That doesn't make them harmful for most healthy adults — they're generally well tolerated. If you want to try one, treat it as a low-stakes add-on rather than the strategy you're relying on. Spend your energy on the well-supported habits above, which cost nothing and carry no downside.
A couple of other widely repeated ideas sit in the same uncertain territory. Cutting back on sugar in your diet is sometimes suggested, but outside of poorly controlled diabetes there's little evidence that what you eat changes how often you get a vaginal yeast infection. Switching laundry detergents or fabric softeners can occasionally help if a specific product is irritating you, but it's not a reliable preventive for most people. None of these are worth stressing over — the well-supported basics do far more work.
Myths worth dropping
A few home remedies circulate endlessly online despite having no good evidence behind them — and some can make things noticeably worse:
- Inserting yogurt vaginally. The supposed logic is "good bacteria," but there's no reliable evidence it prevents infections, and it can introduce irritation or other organisms.
- Garlic, inserted vaginally. Popular, unproven, and a recipe for chemical burns and irritation. Skip it.
- "Anti-Candida" cleanse diets. Elaborate diets that promise to "starve" yeast don't hold up to scrutiny. They won't prevent vaginal yeast infections, and the restrictive versions can do more harm than good.
It's also worth saying plainly: for many women, yeast infections simply aren't fully preventable. They're driven far more by anatomy, antibiotics, and hormones than by anything you did or didn't do. A recurrence is not a hygiene failure or a personal shortcoming — and treating it that way only adds stress to an already irritating problem.
If you're doing the right things and infections still keep returning — four or more in a year is the usual threshold — that's a reason to see a clinician about a longer-term plan, not to try harder on your own. Our guide to recurrent yeast infections covers what that looks like.
Frequent or stubborn infections can also be a clue to something underlying, like uncontrolled diabetes or a weakened immune system, both of which deserve a proper evaluation.
Prevention is worth doing, and the well-supported habits genuinely move the needle. But the goal is to lower your odds, not to chase a guarantee that doesn't exist — and when prevention isn't enough, effective treatment is straightforward and close at hand.