Bacterial vaginosis is the most common vaginal infection in women of reproductive age, yet many women have never heard of it. Understanding BV — its causes, symptoms, and prevention — is essential knowledge for anyone who wants to maintain optimal intimate health. BV is not an STI, but it does increase susceptibility to STIs when present.
What Causes BV
BV occurs when the balance of vaginal bacteria shifts — beneficial Lactobacillus decreases while anaerobic bacteria (like Gardnerella vaginalis) overgrow. This shift raises vaginal pH above the protective acidic range. Triggers include douching (the #1 risk factor), new or multiple sexual partners, unprotected sex (semen raises pH), smoking, and use of scented intimate products. BV is not caused by poor hygiene — in fact, over-cleaning is a more common cause than under-cleaning.
Recognizing Symptoms
Up to 84% of BV cases produce no noticeable symptoms, which is why regular gynecological exams matter. When symptoms do appear, the most common is a thin, grayish-white discharge with a distinctly fishy odor, especially noticeable after sex. Some women experience mild itching or burning during urination. BV discharge differs from yeast infection discharge, which is typically thick, white, and cottage cheese-like. Proper diagnosis requires a healthcare visit — self-diagnosis is wrong about 50% of the time.
Health Risks of Untreated BV
Untreated BV increases risk of acquiring STIs including HIV, chlamydia, and gonorrhea by 60%. During pregnancy, BV raises the risk of preterm birth, low birth weight, and postpartum infections. BV also increases susceptibility to pelvic inflammatory disease (PID). These serious complications make proper treatment important even when symptoms seem mild. If you suspect BV, see your healthcare provider for accurate diagnosis and appropriate antibiotic treatment.
Prevention Strategies
Avoid douching entirely. Use condoms consistently — they prevent semen from disrupting vaginal pH. Quit smoking if applicable. Choose fragrance-free intimate products. Eat probiotic-rich foods daily to support Lactobacillus populations. Limit the number of sexual partners. After your period, boost probiotic intake to restore pH faster. If BV recurs frequently, discuss long-term prevention strategies with your gynecologist, including boric acid suppositories or maintenance antibiotic therapy.
Quick Tips
Never douche — it is the number one risk factor for BV.
Use condoms consistently, as semen's alkaline pH can trigger BV recurrence.
If you smoke, quitting halves your BV risk almost immediately.
Did You Know?
BV is the most common vaginal infection in women ages 15–44.
Up to 84% of women with BV report no noticeable symptoms.
Douching increases BV risk by 60% according to clinical studies.
BV during pregnancy increases risk of preterm birth by 40%.
Key Takeaway
Bacterial vaginosis is common, often asymptomatic, and highly preventable. Avoiding douching, using condoms, eating probiotics, and quitting smoking are the most evidence-based prevention strategies.