Bacterial vaginosis (BV) is treated with prescription antibiotics, typically taken for five to seven days. It’s the most common vaginal infection in women ages 15 to 44, and while it sometimes resolves on its own, antibiotics are the fastest and most reliable way to clear it. The tricky part isn’t the initial treatment; it’s keeping BV from coming back, since 50% to 80% of women experience a recurrence within 6 to 12 months.
What BV Actually Is
Your vagina naturally contains a mix of bacteria, with beneficial species (mainly lactobacilli) keeping the environment slightly acidic. BV happens when that balance tips: the protective bacteria decline and other organisms multiply. This isn’t a sexually transmitted infection, though sexual activity is one of the factors that can trigger the shift. The result is a disrupted vaginal environment rather than a single invading germ, which is partly why BV can be stubborn to treat.
The hallmark symptoms are a thin, grayish-white discharge and a strong fishy odor, especially after sex. Some women also notice mild itching or burning during urination. Others have no symptoms at all and only discover they have BV during a routine exam.
Prescription Treatments That Work
The CDC recommends three first-line options, all requiring a prescription:
- Oral metronidazole: 500 mg taken twice a day for 7 days. This is the most commonly prescribed option and works systemically throughout the body.
- Metronidazole vaginal gel (0.75%): applied once daily for 5 days using a pre-filled applicator. This targets the infection locally with fewer side effects like nausea.
- Clindamycin vaginal cream (2%): applied at bedtime for 7 days. This is a good alternative if you’ve had reactions to metronidazole in the past.
Most women notice the odor and discharge improving within two to three days of starting treatment, but finishing the full course matters. Stopping early increases the chance of the infection returning quickly. If you’re prescribed the oral version, avoid alcohol during treatment and for at least 24 hours afterward, as the combination can cause severe nausea and vomiting.
Why BV Keeps Coming Back
Recurrence is the most frustrating part of dealing with BV. Within a year of successful antibiotic treatment, the majority of women will have at least one more episode. Researchers believe the harmful bacteria form a protective film along the vaginal wall that antibiotics can reduce but not always eliminate completely. Once treatment ends, those residual bacteria can multiply again and tip the balance back.
For women with frequent recurrences (three or more episodes in a year), some providers recommend a longer-term suppressive approach. This typically involves a standard course of antibiotics followed by a lower maintenance dose applied vaginally once or twice a week for several months. The goal is to keep harmful bacteria suppressed long enough for the protective lactobacilli to reestablish themselves.
What About Home Remedies?
If you’ve searched for BV treatments online, you’ve probably seen suggestions for probiotics, boric acid suppositories, hydrogen peroxide rinses, tea tree oil, and yogurt. The evidence behind most of these is limited.
Boric acid vaginal suppositories (600 mg) have the most interest among researchers and some clinicians use them as an add-on for recurrent cases, but the CDC does not include boric acid in its recommended treatment regimens. It’s not a substitute for antibiotics for an active infection.
Probiotic supplements, especially those containing Lactobacillus strains, are a reasonable low-risk addition after antibiotic treatment, but clinical trials have shown mixed results. They’re unlikely to cure BV on their own. Hydrogen peroxide douches, despite the logic that they might restore acidity, can actually irritate vaginal tissue and worsen the problem. There is no home remedy with strong enough evidence to replace antibiotic treatment.
Habits That Lower Your Risk
Douching is one of the biggest controllable risk factors. Women who douche weekly are five times more likely to develop BV than women who don’t. Douching products, whether vinegar-based, baking soda, or iodine solutions, strip away the protective bacteria and alter vaginal pH, creating exactly the conditions BV thrives in. The vagina is self-cleaning; warm water on the outside is all you need.
Other practical steps that help maintain your vaginal balance:
- Skip scented products. Scented tampons, pads, sprays, and powders can disrupt vaginal flora and increase infection risk.
- Use condoms consistently. Semen is alkaline and temporarily raises vaginal pH. Condom use is associated with lower BV rates, especially with new or multiple partners.
- Wear breathable underwear. Cotton or moisture-wicking fabrics reduce the warm, moist environment that encourages bacterial overgrowth.
- Change out of wet clothing promptly. Sitting in a wet swimsuit or sweaty workout clothes for hours creates favorable conditions for the wrong bacteria.
Why Treatment Matters
BV sometimes clears without treatment, which leads some women to wait it out. But untreated BV carries real risks beyond discomfort. It’s frequently found alongside pelvic inflammatory disease (PID), a serious infection of the uterus and fallopian tubes that can cause chronic pain and fertility problems. BV also makes you more susceptible to sexually transmitted infections, including chlamydia, gonorrhea, and HIV, because the loss of protective bacteria weakens the vaginal lining’s natural defenses.
During pregnancy, untreated BV is linked to preterm birth and low birth weight. Pregnant women with symptoms are generally treated with oral antibiotics, as the benefits of clearing the infection outweigh the small risks of medication.
Getting the Right Diagnosis
BV symptoms overlap with yeast infections and other conditions, so treating yourself based on a guess often means treating the wrong thing. A healthcare provider can diagnose BV quickly with a vaginal swab, checking the discharge under a microscope for characteristic “clue cells” (vaginal cells coated with bacteria) and testing the pH. The visit is brief and straightforward.
If you’ve been treated for BV multiple times and it keeps returning, ask your provider about a longer suppressive regimen or whether your partner should be evaluated. While BV isn’t classified as an STI, emerging research suggests that sexual partners may carry the bacteria and reintroduce them, contributing to recurrence in some couples.