Bacterial vaginosis (BV) is cured with prescription antibiotics, and most cases clear up within seven days of treatment. There’s no reliable over-the-counter cure, but antibiotics work well for the initial infection. The real challenge is that BV comes back frequently: 15 to 30% of women have a recurrence within one to three months after treatment, and up to 70% experience it again within nine months.
What’s Actually Happening in Your Body
A healthy vagina is dominated by beneficial bacteria that produce lactic acid, keeping the vaginal pH between 3.5 and 4.5. These bacteria also produce hydrogen peroxide and natural antimicrobial compounds that prevent harmful organisms from gaining a foothold. BV happens when this protective community gets displaced by a mix of anaerobic bacteria that thrive in a less acidic environment.
This shift raises your vaginal pH above 4.5, which creates the hallmark symptoms: a thin, milky discharge and a fishy odor. Some women have no symptoms at all. BV isn’t a single infection caused by one invader. It’s a disruption of the entire ecosystem, which is part of why it’s so prone to returning.
The Antibiotic Treatments That Work
The standard treatment is a course of metronidazole, taken either as oral pills or as a vaginal gel, typically for seven days. Clindamycin, available as a vaginal cream, is an alternative. Both are prescription-only. These antibiotics target the overgrowth of anaerobic bacteria and are effective at resolving symptoms for most women within the treatment period.
You’ll need a clinical diagnosis before starting treatment. A healthcare provider checks for at least three of four signs: the characteristic thin discharge, vaginal pH above 4.5, a fishy odor, and specific changes visible under a microscope. This matters because BV symptoms overlap with yeast infections and other conditions, and treating the wrong one won’t help.
Why BV Keeps Coming Back
Recurrence is the most frustrating part of BV. The antibiotics eliminate the overgrowth, but they don’t always restore the protective bacterial community to full strength. If beneficial bacteria don’t recolonize quickly enough, the same anaerobic species can regain ground.
Sexual activity plays a bigger role than many people realize. Recent evidence has shifted thinking on this significantly. The California Department of Public Health now recommends that clinicians consider treating male sexual partners of women with recurrent BV. The suggested approach is a combination of oral antibiotics and a topical penile cream for seven days, taken at the same time the female partner is being treated. Both partners abstain from sexual contact during treatment. This is a newer recommendation. The CDC’s national guidelines haven’t yet adopted routine partner treatment, but the evidence is strong enough that some states are moving ahead with it. If you’re in a steady relationship and BV keeps returning, ask your provider about concurrent partner treatment.
Boric Acid, Probiotics, and Other Remedies
Boric acid vaginal suppositories are widely discussed online, but the evidence is limited. Boric acid may help with resistant or recurrent infections when combined with a prescription antibiotic or antifungal, but it’s not a standalone cure. Prescription treatments remain more effective and safer. If you’re considering boric acid, use it as a complement to medical treatment rather than a replacement.
Probiotics are another popular option. Several clinical studies have found that probiotic supplements containing specific strains of beneficial bacteria can support vaginal health when used alongside antibiotics. However, the results are inconsistent. One controlled trial of 126 women found no difference in cure rates between those who took oral probiotics with antibiotics and those who took antibiotics alone: both groups had cure rates around 58% at 30 days. Oral probiotics work through an indirect route, traveling through the digestive tract and eventually reaching the vaginal area in small amounts, where they may help the body’s own beneficial bacteria recover. The effect is modest at best, and probiotics alone won’t cure an active BV infection.
Home remedies like apple cider vinegar, tea tree oil, or yogurt lack clinical evidence for treating BV. Some of these can irritate vaginal tissue and worsen the imbalance.
Habits That Protect Your Vaginal Flora
Douching is one of the strongest risk factors for BV. It strips away the protective bacterial layer and raises vaginal pH, creating exactly the conditions anaerobic bacteria need to thrive. The vagina is self-cleaning, and water alone during bathing is sufficient for external hygiene.
Other practices that help maintain a healthy balance:
- Avoid scented products near the vaginal area, including soaps, sprays, and scented tampons or pads
- Wear breathable underwear made from cotton, and change out of wet swimsuits or sweaty workout clothes promptly
- Use condoms with new or multiple partners, since semen has a pH around 7.2 to 8.0, which temporarily raises vaginal pH after unprotected sex
None of these habits will cure an existing infection, but they reduce the odds of disrupting your flora after treatment has restored it.
BV During Pregnancy
BV during pregnancy may increase the risk of preterm delivery, which means giving birth before 37 weeks. Preterm birth carries serious risks for the baby, including breathing problems and bleeding in the brain. Antibiotics are safe and available for treating BV during pregnancy. If you’re pregnant and notice unusual discharge or odor, bring it up with your provider. The U.S. Preventive Services Task Force notes that while BV during pregnancy is associated with preterm delivery, it’s not yet clear whether BV directly causes it.
Managing Recurrent BV Long-Term
If you’ve had three or more episodes in a year, you’re dealing with recurrent BV, and the approach shifts from one-time treatment to longer-term management. Some providers prescribe extended or maintenance courses of antibiotics, using a lower frequency over weeks or months to keep the anaerobic bacteria suppressed while your natural flora rebuilds.
Concurrent partner treatment, as mentioned above, is one of the most promising strategies for breaking the recurrence cycle. The combination of treating both partners, avoiding reinfection during the treatment window, and supporting your vaginal microbiome afterward gives you the best chance of staying BV-free. This is a conversation worth having with your healthcare provider, especially if you’ve been through multiple rounds of antibiotics that initially work but don’t hold.