Bacterial Vaginosis: Why Your Vagina Is Imbalanced & What to Do Next

If you've noticed a change in vaginal odor, discharge, or general comfort, you may be wondering whether you have bacterial vaginosis (BV). It's one of the most common vaginal conditions in women of reproductive age — and while it's usually not dangerous, it does require proper attention and treatment.

Let's break down what bacterial vaginosis is, why it happens, what symptoms to look for, and the medical next steps you should take.

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What Is Bacterial Vaginosis?

Bacterial vaginosis happens when the natural balance of bacteria in the vagina is disrupted.

A healthy vagina contains mostly Lactobacillus bacteria. These "good" bacteria help maintain a slightly acidic environment (low pH), which protects against infection.

With bacterial vaginosis:

• The level of protective Lactobacillus drops
• Other bacteria overgrow
• The vaginal pH becomes less acidic
• Symptoms can develop

BV is not officially classified as a sexually transmitted infection (STI), but sexual activity can increase the risk.

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Why Does Bacterial Vaginosis Happen?

Doctors don't always know exactly why bacterial vaginosis develops, but several risk factors are well established.

Common causes and risk factors include:

• New or multiple sexual partners
• Unprotected sex
• Douching
• Using scented vaginal products
• Natural hormonal changes
• Having a female sexual partner
• Smoking

It's important to understand:

• BV is not caused by poor hygiene
• You cannot get BV from toilet seats or swimming pools
• It is not a "dirty" condition

It is simply a microbial imbalance.

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Symptoms of Bacterial Vaginosis

Some women have no symptoms at all. In fact, many cases are discovered during routine exams.

When symptoms do occur, they often include:

• Thin white, gray, or milky vaginal discharge
• A strong "fishy" vaginal odor (especially after sex)
• Mild vaginal itching
• Burning during urination

What BV usually does not cause:

• Thick, clumpy discharge (that's more typical of a yeast infection)
• Severe pain
• Significant redness or swelling

If you're experiencing any of these symptoms and want clarity on what might be causing them, try Ubie's free AI symptom checker to get personalized insights in just a few minutes and understand your next steps.

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How Is Bacterial Vaginosis Diagnosed?

A healthcare provider can diagnose bacterial vaginosis with:

• A pelvic exam
• Testing vaginal discharge
• Checking vaginal pH
• Looking for specific "clue cells" under a microscope

In some cases, additional testing is done to rule out:

• Yeast infections
• Trichomoniasis
• Other sexually transmitted infections

It's important not to self-diagnose solely based on smell or discharge. Different vaginal infections can look similar but require different treatments.

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Is Bacterial Vaginosis Dangerous?

In most cases, bacterial vaginosis is not life-threatening. However, leaving it untreated can increase certain health risks.

Potential complications include:

• Increased risk of sexually transmitted infections (including HIV)
• Pelvic inflammatory disease (PID)
• Complications during pregnancy (such as preterm birth)
• Increased risk of infection after gynecologic surgery

If you are pregnant or trying to conceive, treatment becomes especially important.

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Treatment for Bacterial Vaginosis

The good news: bacterial vaginosis is treatable.

Doctors typically prescribe antibiotics such as:

• Metronidazole (oral or vaginal gel)
• Clindamycin (cream or oral)

Important points about treatment:

• Always finish the full course of antibiotics
• Avoid alcohol if taking oral metronidazole
• Symptoms often improve within a few days
• Recurrence is common

Up to 30% of women may experience BV again within three months. This can be frustrating, but it does not mean something is "wrong" with you.

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Why Does Bacterial Vaginosis Come Back?

Recurrent bacterial vaginosis is common.

Possible reasons include:

• Persistent bacterial imbalance
• Sexual activity
• Incomplete restoration of healthy Lactobacillus bacteria
• Biofilm formation (bacteria forming protective layers)

If BV keeps returning, your doctor may recommend:

• A longer antibiotic course
• Maintenance therapy
• Probiotics (though evidence is still evolving)
• Testing for other infections

Ongoing symptoms should never be ignored.

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What You Should NOT Do

When dealing with bacterial vaginosis, avoid:

• Douching (this worsens imbalance)
• Using scented soaps or feminine sprays
• Trying random over-the-counter yeast infection treatments
• Ignoring symptoms that persist

Using the wrong treatment can delay proper care.

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Bacterial Vaginosis vs. Yeast Infection

Many women confuse the two. Here's a quick comparison:

Bacterial Vaginosis	Yeast Infection
Thin gray/white discharge	Thick, cottage cheese-like discharge
Fishy odor	Usually no strong odor
Mild irritation	Significant itching and redness
Caused by bacterial imbalance	Caused by fungal overgrowth

If you're unsure, medical testing is the safest option.

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Can You Prevent Bacterial Vaginosis?

There's no guaranteed prevention method, but you can reduce your risk.

Helpful strategies include:

• Avoid douching
• Use mild, unscented soap externally only
• Use condoms
• Limit multiple sexual partners
• Avoid smoking
• Wear breathable cotton underwear

Remember: the vagina is self-cleaning. It does not need internal washing.

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When to See a Doctor

You should speak to a doctor if:

• You notice a strong fishy odor
• Discharge changes in color or consistency
• You are pregnant and have symptoms
• You experience pelvic pain
• You have fever
• You develop pain during sex
• Symptoms return after treatment

While bacterial vaginosis itself is rarely life-threatening, pelvic pain, fever, or severe symptoms could indicate something more serious, such as pelvic inflammatory disease. These require prompt medical care.

Never delay seeking care if symptoms feel intense, unusual, or rapidly worsening.

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The Bottom Line

Bacterial vaginosis is extremely common and treatable. It happens when the natural balance of vaginal bacteria shifts, leading to odor and discharge changes. It is not a sign of poor hygiene and not something to feel embarrassed about.

What matters most is:

• Getting an accurate diagnosis
• Taking the full course of prescribed treatment
• Following up if symptoms return

If you're not sure where to start or want to better understand your symptoms before booking an appointment, Ubie's free AI-powered symptom checker can help you identify possible causes and guide your next steps with confidence.

Most importantly, speak to a doctor about any persistent, severe, or concerning symptoms. Early evaluation can prevent complications and give you peace of mind.

Your vaginal health is part of your overall health — and it deserves attention, not anxiety.