>50% of women see BV return within 6 to 12 months of treatment
Halved recurrence when a regular male partner was treated too
Avoid douching and internal washes, which worsen the imbalance

The cycle you already know

You finished the antibiotics, the smell and discharge cleared, and within a few weeks it was back. Again.

BV happens when the protective lactobacilli that keep the vagina acidic get outnumbered by other bacteria. It is the most common vaginal condition in women of reproductive age, and the relapse rate has been its most frustrating feature.

Why it keeps returning

For years women were told BV was not sexually transmitted and that partners did not need treating. That assumption is the part that just shifted.

Researchers found the same BV-associated bacteria living on male partners, which helps explain why so many women get reinfected after a clean course of antibiotics.

Research note

The StepUp trial, published in the New England Journal of Medicine in March 2025, randomized 164 monogamous couples. When the male partner was treated alongside the woman, BV recurrence was roughly halved compared with treating the woman alone. The trial was stopped early because treating the woman only was clearly inferior.

This is the bit clinics are still catching up on. Recurrent BV may be a couples problem, not a personal-hygiene failing.

What actually helps

BV is not a cleanliness issue, and washing harder makes it worse. Douching and internal soaps strip the very bacteria that protect you, so the gentler approach genuinely wins.

Beyond the prescribed antibiotic, vaginal lactobacillus probiotics show promise as an add-on for cutting recurrence, while evidence for ordinary oral probiotic capsules is weaker.

Practical tip

Skip douches, scented washes and internal wipes entirely, and let plain water do the outside cleaning. If BV keeps returning, raise the 2025 partner-treatment evidence with your clinician, since treating a regular partner is a reasonable conversation rather than a fringe idea. Always get recurrent symptoms confirmed rather than self-treating, because thrush and BV can feel similar but need different medicine.

Does this mean my partner cheated?

No, and this is worth saying clearly. The bacteria involved in BV can be shared between long-term, monogamous partners without anyone being unfaithful.

Treating a partner is about breaking a reinfection loop, not assigning blame. Framing it that way makes the conversation much easier to have.

It also helps to know BV is extremely common and not a sign of being unclean. The vaginal microbiome is delicate, and small things can tip it off balance.

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When to see a doctor

See a clinician for a proper diagnosis if you have a change in discharge, odor, itching or discomfort, especially if it keeps coming back, since repeated BV is worth a tailored plan. Get checked promptly if symptoms appear during pregnancy, because BV in pregnancy is linked to higher risks and benefits from supervised treatment.

Medical disclaimer: This article is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.

References

  1. Vodstrcil LA, Bradshaw CS, et al. Male-Partner Treatment to Prevent Recurrence of Bacterial Vaginosis. New England Journal of Medicine. 2025. NEJM
  2. Revisiting Bacterial Vaginosis: Evidence for Sexual Transmission and Partner Treatment. Cepheid clinical summary. 2025. Link
  3. Male partner treatment lowers the risk of BV reoccurrence. 2 Minute Medicine. 2025. Link