Vaginal & Intimate Health

Can you give bacterial vaginosis to a man? Doctor P explains what he can carry, what symptoms to watch for, and when he needs testing or treatment.

Can You Give Bacterial Vaginosis to a Man? An OB/GYN Explains

October 19, 2026

Your treatment is finished, the symptoms are gone, and there is one question you have not said out loud to him yet. Could he be carrying something, and if he is, what does that mean for him?

That question deserves a straight answer rather than a shrug or a guilty silence. The honest version has three parts. What he can and cannot get, what he might notice in his own body, and the one situation where it is worth bringing him into your treatment plan.

Quick answer: No. A man cannot be diagnosed with bacterial vaginosis, because BV is an imbalance in the vagina’s own bacteria. He can still carry the same bacteria on his penile skin or in his urethra, usually without any symptoms. If he notices burning or discharge, he needs an STI test, and treating him is usually reserved for BV that keeps coming back.

I'm a board-certified OB/GYN, and in this video I walk through what a male partner can carry, what he might notice, and when treating him is worth discussing.

He Cannot Have BV, but He Is Not Out of the Picture

The label matters here, because it explains why “no” is only half of the answer.

Why He Cannot Be Diagnosed

Bacterial vaginosis is defined by what is happening inside the vagina, where Gardnerella vaginalis and other bacteria overgrow and crowd out the protective ones. A man does not have a vagina, so he cannot have BV in the way it is diagnosed in you.

What the Research Shows He Can Carry

He can still pick up BV-associated bacteria from you and carry them on his penile skin and in his urethra without a single symptom. In couples where the woman has BV, the bacteria on his skin and in his urethra look much more like her vaginal bacteria than they look like a stranger’s.

That is one way those bacteria can find their way back to you after you have finished treatment. It is also why carrying and being infected are two different things for him. A man’s own penile bacteria can even predict BV in his female partner, which tells us the exchange is real even when he feels completely fine.

Does Circumcision Change the Picture?

It seems to, a little, though the answer is easy to overstate.

What the Studies Found

Men who are circumcised tend to carry fewer of the bacteria linked to BV on their penile skin. In a large randomized trial in Uganda, women whose partners had been circumcised had lower rates of BV a year later, about 40% compared with about 51%.

What It Does Not Mean

This is a pattern in the research, not a reason to recommend circumcision. It also does not mean an uncircumcised partner will cause your BV. The strongest data come from African trials and cohorts, so I treat it as one more piece of the puzzle and not a rule.

What He Might Notice

Most men who carry these bacteria feel nothing. When something does show up, it is a different condition called urethritis.

Here is how the three most common situations break down.

Situation	What it means	What to do
He has no symptoms	He may simply be carrying the bacteria	Usually nothing, unless your BV keeps returning
He has burning or discharge	Possible urethritis, often from an STI	Get tested before anyone is treated
Your BV keeps coming back	Reinfection may be part of the pattern	Ask your provider about treating him too

Signs of Urethritis in a Man

Urethritis is irritation or infection of the urethra, the tube urine and semen leave through. He may notice burning when he urinates, redness, or discharge from the tip of the penis. Many men with urethritis have no symptoms at all.

Why He Should Get Tested Instead of Guessing

If he has any of those symptoms, I do not want him to assume it is connected to your BV. The most common causes of urethritis are gonorrhea, chlamydia, Mycoplasma genitalium, and trichomoniasis, and a simple urine test can tell which one it is.

Whether BV bacteria cause urethritis themselves is still unproven. That is exactly why a proper test is safer than a guess, and why you should be tested for other STIs too, since CDC advises testing for all women with BV.

Does He Need Treatment?

For one episode of BV, usually not. For BV that keeps returning, it is a conversation worth having.

When He Does Not Need Antibiotics

Your partner does not need antibiotics just because you had BV once, especially if he has no symptoms. Carrying the bacteria is not the same as having an infection, and treating someone who is not sick adds side effects without a clear benefit.

When It Is Worth Raising

If your BV keeps coming back after treatment, that is the time to ask your provider whether treating him at the same time makes sense. Older guidelines do not recommend treating partners routinely, but a 2025 trial found that treating the male partner alongside the woman lowered how often BV came back.

What he would take should be decided by a provider, not copied from your prescription. For the fuller breakdown of that research, I walk through it in can you have sex if you have bacterial vaginosis, and why BV keeps coming back with the same partner covers the recurrence side.

Talking With Your Partner and Looking Beyond Him

Treatment is only one part of the plan, and your partner is only one piece of why BV shows up.

Make It a Conversation, Not a Confession

So many of my patients carry these infections quietly and never tell their partner. I would rather you have the conversation, so he understands what is happening and can be part of the plan. This is not about blame. It is about two people making the same infection less likely to return.

Look Beyond Your Partner

Semen can shift your vaginal pH, which I explain in can a man throw off your pH balance, and your habits, cycle, and hormones all play a part too.

When BV keeps resurfacing no matter what you change, I look past the infection itself. That is why I created the Ultimate Hormone Assessment, to map the hormonal patterns that can keep your vaginal environment fragile, instead of handing you another round of treatment. If you want the non-antibiotic options first, start with how to get rid of BV without antibiotics.

Frequently Asked Questions

Can you give bacterial vaginosis to a man?

No. A man cannot be diagnosed with bacterial vaginosis because it is an imbalance of bacteria in the vagina. He can carry the same bacteria on his penile skin or in his urethra without symptoms, and those bacteria can be passed back to you. Carrying them is not the same as being infected.

Can a man carry BV bacteria without knowing it?

Yes. Research on couples shows that a male partner’s penile skin and urethral bacteria often closely match his partner’s vaginal bacteria when she has BV, and most men feel nothing at all. That is why BV can return after treatment even when neither of you notices anything new.

Does my partner need treatment if I have BV?

Usually not for a single episode, especially if he has no symptoms. If your BV keeps coming back after treatment, ask your provider whether treating him at the same time makes sense. The treatment and timing should come from a provider, not from copying your prescription.

What does urethritis feel like in a man?

He may notice burning when he urinates, redness, or discharge from the tip of the penis, though many men have no symptoms. Because gonorrhea, chlamydia, Mycoplasma genitalium, and trichomoniasis are the most common causes, he should get tested rather than assume it is related to your BV.

Does circumcision affect bacterial vaginosis?

It may. Circumcised men tend to carry fewer BV-linked bacteria on their penile skin, and in a Uganda trial their female partners had lower BV rates a year later. It is a pattern in the research, not a reason to recommend circumcision, and it does not mean an uncircumcised partner will cause your BV.

This content is for educational purposes only. It is not diagnostic and is not a substitute for personalized medical advice from your provider.