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You can lower your odds of bacterial vaginosis, but you can't guarantee they'll stay away. The habits with the best evidence are simple: don't douche, skip scented and harsh vaginal products, and use condoms. Probiotics are low-risk and plausible but unproven. And nothing here is about washing more — BV is a bacterial balance problem, not a hygiene failure.
If you've had bacterial vaginosis once — or more than once — the natural next question is how to keep it from happening again. The honest answer is that prevention is real but partial. A handful of habits genuinely shift the odds in your favor, a few popular ones do nothing, and at least one common instinct quietly makes things worse. This guide separates what the evidence supports from what it doesn't, so you can spend your effort where it actually counts.
What actually works
BV develops when the protective Lactobacillus that normally keep the vagina slightly acidic decline, and other bacteria overgrow in their place. Most evidence-based prevention comes down to one idea: leave that delicate balance alone, and avoid the things that disrupt it. The measures with the strongest support are unglamorous, which is part of why they get overlooked.
- Don't douche. This is the single clearest one. Douching flushes out the very bacteria that protect you and is consistently linked to higher BV risk. The vagina is self-cleaning; it does not need to be rinsed internally.
- Skip scented and harsh products. Perfumed washes, "feminine hygiene" sprays, scented tampons, and strong soaps used internally can irritate tissue and disturb the bacterial mix. Warm water on the external skin is enough.
- Use condoms. Consistent condom use is associated with lower BV rates, likely because it limits the exposure of the vaginal environment to semen and partner-associated bacteria, both of which can nudge the pH and the bacterial balance.
- Be mindful of partner changes. A new partner, or several partners, raises the odds — not because BV is "caught" in the classic sense, but because the vaginal ecosystem is sensitive to that kind of change. There's nothing to feel guilty about here; it's biology, not behavior to apologize for.
- Consider whether smoking plays a role. Smoking is associated with a higher likelihood of BV, and stopping carries plenty of other benefits, so it's a reasonable lever if it applies to you.
None of these is a guarantee, and they work best stacked together rather than chosen one at a time. If you've noticed BV tends to follow a specific trigger for you — a particular product, a stretch of frequent unprotected sex — that pattern is worth paying attention to, because it points at what's tipping your own balance. The broader story of why the balance tips is covered in what causes BV.
Where probiotics stand
Probiotics are the prevention question we get asked about most, so it's worth being straight about them. The logic is appealing: if BV is a shortage of protective Lactobacillus, why not replace them? Some studies — particularly of certain Lactobacillus strains, taken orally or used vaginally — suggest a possible benefit, especially as an add-on after antibiotic treatment. But the research is mixed, the products vary enormously in what they actually contain, and the evidence isn't strong enough for clinicians to promise results.
Here's a practical way to hold it: probiotics are generally low-risk and inexpensive, so trying a reputable product is reasonable, but treat it as a maybe-helpful supplement rather than a proven shield. They are not a substitute for treating an active infection, and they won't undo the effect of douching. If your BV keeps returning despite sensible habits, that's a conversation to have with a clinician rather than a problem to solve in the supplement aisle — more on that in recurrent BV.
Myths worth dropping
A lot of well-meaning advice about BV is not just unhelpful but counterproductive. Clearing these out is part of prevention, because acting on them can actively tip your balance the wrong way.
- "It means I'm not clean enough." BV is not a hygiene failure. It happens to people with meticulous routines. The shame attached to it is misplaced and gets in the way of clear thinking.
- "More washing will fix it." The opposite is often true. Aggressive cleaning, internal washing, and scented products strip protective bacteria and can trigger or worsen BV. Less is genuinely more.
- "I caught it from a toilet seat or a pool." BV doesn't spread through surfaces, water, or shared facilities. It's a shift in bacteria that already live in your body.
- "My male partner needs treatment too." Routine treatment of male partners is not recommended in standard guidance and doesn't reliably prevent recurrence. Treatment is aimed at the person with symptoms.
When prevention isn't enough
Even with every sensible habit in place, some people still get BV — sometimes repeatedly. That's not a sign you did prevention wrong. The vaginal microbiome is genuinely hard to fully control, and recurrence is common even after correct treatment. When that's the pattern, the answer usually isn't more scrubbing or more supplements; it's a medical plan, which can include a longer or repeated course or a maintenance regimen under guidance.
Prevention is about lowering odds, not diagnosing. See a clinician in person rather than relying on self-care if you have fever, pelvic or lower-abdominal pain, or a possible STI exposure; if you might be pregnant; if you've had three or more episodes in a year; or if symptoms don't clear after a completed course of treatment. Vyta.co's online BV care is for non-pregnant adult women — anyone pregnant should be evaluated by their prenatal provider.