Is it an STI?
Bacterial vaginosis is not classified as a sexually transmitted infection. It's an imbalance of the bacteria that naturally live in the vagina, rather than an infection passed from one person to another in the way chlamydia or gonorrhoea are.
That said, BV is more common in people who are sexually active, and things like a new sexual partner or multiple partners can disturb the vaginal balance and trigger it — so it's linked to sex, even though it isn't an STI.
Is it contagious?
You can't 'catch' BV the way you catch an STI, and men don't usually need treatment when a female partner has BV. However, BV can be passed between female partners, and women who have sex with women can share the same imbalance, so both partners may benefit from assessment in that situation.
For most heterosexual couples, treating the male partner doesn't prevent BV coming back, so routine partner treatment isn't recommended.
Why it keeps coming back
BV recurring is common and frustrating, but it doesn't mean you've done anything wrong. Things that raise the risk include douching, scented washes, smoking, and changes in sexual partners. Avoiding douching and scented products, and not over-washing, are among the most useful steps.
If BV keeps returning, don't just keep self-treating — see a GP to confirm it's actually BV and discuss a prevention plan. A telehealth consult is an easy way to do that.
Related condition
Vaginal & vulval health →References & sources
- 1.Vaginal thrush — healthdirect
- 2.Vaginal thrush — Better Health Channel
- 3.Bacterial vaginosis — Better Health Channel
- 4.Vulva and vagina — Jean Hailes for Women's Health
This content is general information and not a substitute for individual medical advice. Please consult a GP for your personal situation.
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