You can’t flush out bacterial vaginosis, and trying to will likely make it worse. BV is a bacterial imbalance deep in the vaginal microbiome, not something you can rinse away. Douching, the most common form of vaginal “flushing,” is actually one of the known risk factors for developing BV in the first place. What does work is a short course of antibiotics combined with habits that help your vaginal environment recover on its own.
Why Douching Makes BV Worse
The instinct to flush out BV makes sense. You have an unpleasant fishy odor, grayish discharge, and you want it gone. But BV isn’t caused by something foreign sitting inside the vaginal canal. It happens when the protective bacteria (mainly Lactobacillus species) that normally dominate the vagina decline sharply, and harmful anaerobic bacteria multiply to 100 to 1,000 times their normal concentration. Gardnerella is the most common of these overgrown bacteria, but dozens of other species pile on too.
Lactobacillus bacteria produce lactic acid, which keeps the vaginal pH acidic (around 3.8 to 4.5) and hostile to harmful microbes. When you douche, you wash away these protective bacteria along with everything else. That raises your pH and gives the anaerobic bacteria an even bigger advantage. The CDC lists “not douching” as a basic prevention step for BV. The same applies to any scented sprays, soaps, or products inserted into the vagina. Warm water on the vulva is all you need for hygiene.
What Actually Clears BV
BV requires antibiotic treatment. The CDC recommends three first-line options: an oral antibiotic taken twice daily for seven days, an antibiotic gel applied vaginally once daily for five days, or an antibiotic cream applied vaginally at bedtime for seven days. Your provider will help you choose between oral and topical options based on your preferences and health history.
Most people notice the odor and discharge improving within the first two to three days of treatment. Even so, finishing the full course matters. Stopping early increases the chance of the infection bouncing back because the harmful bacteria haven’t been fully suppressed.
BV Recurrence Is Extremely Common
Here’s the frustrating reality: 50% to 80% of women who complete antibiotic treatment will have BV come back within 6 to 12 months. This high recurrence rate is a major reason people search for ways to “flush” BV out themselves. It can feel like antibiotics aren’t really solving the problem.
Recurrence happens because antibiotics kill the overgrown harmful bacteria but don’t necessarily restore a healthy Lactobacillus population. If the protective bacteria don’t recolonize fully, the environment remains vulnerable. Several things can tip the balance again: a new sexual partner, unprotected sex (semen is alkaline and temporarily raises vaginal pH), scented menstrual products, or even certain lubricants and condoms.
Do Probiotics Help?
Probiotics are one of the most popular natural approaches people try, and the idea is sound in theory: replenish the Lactobacillus bacteria that BV depleted. In practice, the evidence is disappointing. A clinical trial testing two well-studied probiotic strains (L. rhamnosus GR-1 and L. reuteri RC-14) as an add-on to standard antibiotic treatment found no improvement in cure rates. At 30 days, the probiotic group had a 58% cure rate compared to 60% in the antibiotics-only group. By 90 days, the probiotic group actually fared slightly worse at 37% versus 49%.
The researchers found that the probiotic species were rarely detected in vaginal or gut samples after the women took them orally, which likely explains the lack of effect. The bacteria simply didn’t colonize where they needed to. This doesn’t mean all probiotic approaches are useless, but oral probiotic supplements for BV don’t have strong clinical support right now.
Habits That Support Recovery
While antibiotics do the heavy lifting, you can create conditions that help your vaginal microbiome recover and stay balanced.
- Skip all internal products. No douches, no vaginal deodorants, no scented tampons or pads. These contain chemicals and fragrances that shift vaginal pH toward alkaline, which favors the bacteria that cause BV.
- Use condoms or dental dams. Semen is alkaline and temporarily disrupts vaginal pH after sex. Barrier methods prevent this pH shift and also reduce exposure to new bacteria from partners.
- Wash with warm water only. Your vagina is self-cleaning. Soap on the vulva (the external area) is fine if it’s unscented, but nothing should go inside the vaginal canal.
- Wear breathable underwear. Cotton or moisture-wicking fabrics help keep the area dry, which discourages anaerobic bacterial growth.
Why Leaving BV Untreated Is Risky
Some people avoid treatment hoping BV will resolve on its own, especially after multiple rounds of antibiotics. BV does occasionally clear without treatment, but leaving it unchecked carries real health consequences. Women with BV are 3.4 times more likely to contract chlamydia and 4.1 times more likely to contract gonorrhea, because the depleted Lactobacillus barrier that normally helps block infections is compromised. BV also increases susceptibility to HIV and HPV.
The reproductive risks are significant too. BV-associated bacteria found in the uterine lining are linked to a 3.4-fold increased risk of infertility. Subclinical pelvic inflammatory disease, an infection of the reproductive organs that can cause lasting damage without obvious symptoms, is 2.7 times more common in women with BV. During pregnancy, untreated BV raises the risk of preterm birth and other complications.
What to Do When BV Keeps Coming Back
If you’re dealing with recurrent BV, your provider may recommend a longer or different treatment approach. Some clinicians prescribe a maintenance regimen where you use a vaginal antibiotic gel periodically after the initial treatment course to keep harmful bacteria from rebounding. Boric acid vaginal suppositories are sometimes used as an adjunct treatment for recurrent cases, though they’re not a first-line option and should only be used under clinical guidance.
Tracking your recurrences can also reveal patterns. If BV returns after sex with a particular partner, after your period, or after using a specific product, that information helps you and your provider target the trigger rather than just treating the symptoms each time. Some emerging approaches focus on treating sexual partners simultaneously, based on growing evidence that BV-associated bacteria can be shared between partners and reintroduced after treatment.