Vaginal Infections: Yeast Infections vs. Bacterial Vaginosis (BV)

TL;DR: Yeast infections and bacterial vaginosis (BV) are both very common, but they're caused by different things and need different treatments. Yeast infections come from an overgrowth of fungus (usually Candida) and cause thick, white, itchy discharge. BV happens when the natural bacteria in your vagina get out of balance, causing thin, grayish discharge with a fishy smell. Both are treatable, neither means you're 'dirty,' and knowing the difference helps you get the right care faster.

If you've ever experienced unusual discharge, itching, or a smell that seems off, you've probably wondered, is this a yeast infection? BV? Something else entirely? You're far from alone. These are two of the most common vaginal infections in the world, and most women will deal with at least one of them at some point.

The tricky part is that they can feel similar, but they're actually quite different, and they need different treatments. Let's walk through everything you need to know.

What's the Difference? A Quick Overview

Before we go deeper, here's the key distinction:

• Yeast infection, Caused by an overgrowth of a type of fungus called Candida (most often Candida albicans). It's a fungal infection.
• Bacterial vaginosis (BV), Caused by an imbalance in the bacteria that naturally live in your vagina. It's a bacterial condition, not a true "infection" in the traditional sense, your own bacteria are just out of balance.

Both affect the vagina, both cause abnormal discharge, and both are very treatable. But mixing up the two can mean using the wrong treatment and prolonging your symptoms.

What Is a Yeast Infection?

Your vagina naturally contains small amounts of Candida fungus. Normally, "good" bacteria called Lactobacillus keep that fungus in check. A yeast infection happens when something disrupts that balance and Candida grows out of control.

Symptoms of a Yeast Infection

• Thick, white discharge, Often described as looking like cottage cheese. It's usually odorless.
• Intense itching and irritation, In and around the vagina and vulva (the external genital area).
• Burning sensation, Especially during urination or sex.
• Redness and swelling, The vulva may look red and feel puffy or sore.

What Causes Yeast Infections?

Anything that disrupts the natural environment in your vagina can trigger one:

• Antibiotics, They kill bacteria, including the "good" Lactobacillus that keeps yeast in check. This is one of the most common triggers.
• Hormonal changes, Pregnancy, the menstrual cycle, or hormonal contraceptives can shift the balance. (See our contraception guide for more on how different methods affect your body.)
• Uncontrolled diabetes, High blood sugar creates an environment where yeast thrives.
• A weakened immune system, From illness, medication, or stress.
• Tight, non-breathable clothing, Yeast loves warm, moist environments.

Who Gets Yeast Infections?

Nearly 75% of women will have at least one yeast infection in their lifetime. They're not sexually transmitted, and you can get one whether or not you're sexually active.

What Is Bacterial Vaginosis (BV)?

BV is the most common vaginal condition in women of reproductive age. It happens when the balance of bacteria in your vagina tips, specifically, when the helpful Lactobacillus bacteria decrease and other bacteria (like Gardnerella vaginalis) overgrow.

BV isn't considered a sexually transmitted infection (STI), though sexual activity can increase the risk. It can occur in women who have never had sex.

Symptoms of BV

• Thin, grayish-white discharge, The texture is very different from a yeast infection.
• A noticeable "fishy" smell, This is often the most recognizable symptom. The smell may be stronger after sex or during your period.
• Mild itching or irritation, Usually less intense than a yeast infection.
• Sometimes, no symptoms at all, Up to 50% of women with BV don't notice anything unusual.

What Causes BV?

The exact cause isn't fully understood, but known risk factors include:

• Douching, This is a big one. Douching washes away the good bacteria and disrupts your vaginal pH (the acid-alkaline balance that keeps things healthy).
• New or multiple sexual partners, Though BV isn't an STI, sexual activity can change the vaginal environment.
• Lack of Lactobacillus bacteria, Some women naturally have lower levels, making them more prone to BV.
• Smoking, Research has linked smoking to higher BV rates.
• Using scented soaps or products in the vaginal area, These can irritate the vagina and throw off the bacterial balance. (Our period hygiene guide covers how to keep things clean without overdoing it.)

Yeast Infection vs. BV: Side-by-Side Comparison

If you're still unsure which one you're dealing with, that comparison table is your friend, but seeing a healthcare provider is always the best move.

How Are They Treated?

Treating a Yeast Infection

Yeast infections are treated with antifungal medications. These come in two main forms:

• Over-the-counter (OTC) options, Creams, ointments, or vaginal suppositories (small solid doses inserted into the vagina) containing miconazole or clotrimazole. Common brands include Monistat and Canesten. Treatment usually lasts 1 to 7 days.
• Prescription oral medication, A single dose of fluconazole (Diflucan) is the most common prescription option.

If you've been diagnosed with a yeast infection before and recognize the symptoms, OTC treatment is usually fine. But if it's your first time, if symptoms are severe, or if infections keep coming back, see a doctor.

Treating BV

BV requires antibiotics, it will not respond to antifungal medications (which is why getting the right diagnosis matters). Treatment options include:

• Metronidazole, Available as an oral pill or a vaginal gel. This is the most commonly prescribed option.
• Clindamycin, Available as a vaginal cream.

A course of treatment typically lasts 5 to 7 days. It's important to complete the full course even if symptoms improve before you're done.

A note on recurrence: BV is frustratingly prone to coming back. About 50% of women who are treated for BV will have a recurrence within 12 months. If this happens to you, your doctor can discuss extended or maintenance treatment plans.

When to See a Doctor

It's always better to get checked if you're unsure. But definitely see a healthcare provider if:

• This is your first time experiencing these symptoms
• Symptoms don't improve after OTC treatment for a yeast infection
• Infections keep coming back, Four or more yeast infections in a year is considered "recurrent" and needs investigation
• You're pregnant, BV during pregnancy is linked to preterm birth and should be treated promptly
• You also have symptoms like pelvic pain, fever, or sores, These could point to something else, like an STI, and need proper testing
• Your discharge has changed significantly, If you want to understand what's normal and what's not, check out our vaginal discharge guide

Self-diagnosis is tempting, but studies show that women who self-diagnose a yeast infection are wrong about a third of the time. Getting tested is quick, and it saves you from using the wrong treatment.

Prevention Tips

You can't always prevent these infections, but you can reduce your risk significantly:

For Both Yeast Infections and BV

• Skip the douche, Your vagina is self-cleaning. Douching does more harm than good. Every time.
• Avoid scented products, No scented soaps, sprays, washes, or wipes in or around your vagina. Warm water is enough for cleaning the vulva, and a mild, unscented soap is fine for the outer area.
• Wear breathable underwear, Cotton is ideal. Change out of sweaty clothes or wet swimwear promptly.
• Wipe front to back, This prevents bacteria from the anal area from reaching the vagina.
• Take probiotics, Some evidence suggests that probiotics containing Lactobacillus strains can help maintain a healthy vaginal environment, though more research is needed.

Specifically for Yeast Infections

• Avoid unnecessary antibiotics, Only take antibiotics when your doctor prescribes them, and ask about preventive antifungal treatment if you're prone to yeast infections after antibiotics.
• Manage blood sugar, If you have diabetes, keeping your blood sugar well-controlled reduces your risk.
• Change out of damp clothing quickly, Gym clothes, swimsuits, yeast loves moisture.

Specifically for BV

• Use condoms, They may help maintain the vaginal bacterial balance during sex.
• Limit scented menstrual products, Opt for unscented pads, tampons, or menstrual cups. (See our period hygiene tips for more guidance.)

Let's Talk About the Stigma

In many African communities, vaginal infections carry a heavy layer of shame. Unusual discharge or odor is sometimes seen as a sign of being "unclean" or promiscuous, and that stigma keeps many women from seeking help. Some turn to harmful remedies like herbal vaginal steaming, inserting garlic, or over-douching, which can actually make things worse.

Here's the truth: vaginal infections are a normal part of having a vagina. They don't mean you did anything wrong. They don't reflect your hygiene, your character, or your worth.

The vagina has its own complex ecosystem, and sometimes that ecosystem gets disrupted, by antibiotics, hormones, stress, or reasons that aren't fully understood. Getting treatment isn't something to be embarrassed about. It's just basic healthcare, like treating a sore throat or a skin rash.

If you're uncomfortable talking to your doctor about vaginal symptoms, try writing your symptoms down beforehand. You can even show them this article. Whatever gets you the care you need.

The Bottom Line

Yeast infections and BV are incredibly common and very treatable. The most important things to remember are: they're different conditions that need different treatments, self-care goes a long way in prevention, and there is absolutely no shame in getting help.

Your vaginal health is part of your overall health, and it deserves the same attention and care as everything else.

References

1. CDC. "Bacterial Vaginosis (BV)." cdc.gov
2. CDC. "Vaginal Candidiasis." cdc.gov
3. Cleveland Clinic. "Vaginitis." clevelandclinic.org
4. ACOG. "Vaginitis." acog.org
5. WHO. "Sexually Transmitted Infections (STIs)." who.int
6. Office on Women's Health. "Vaginal Yeast Infections." womenshealth.gov
7. Mayo Clinic. "Bacterial Vaginosis." mayoclinic.org

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• Understanding Your Vaginal Discharge: What's Normal and What's Not
• STIs: Symptoms, Prevention, and Treatment
• Contraception Methods Compared: Which One Is Right for You?
• Period Hygiene: Tips for Staying Fresh and Healthy