Yeast Infection or BV? How to Tell the Difference

Vaginal symptoms are uncomfortable — and confusing. Many women who think they have a yeast infection actually have bacterial vaginosis (BV), and vice versa. This matters because they're caused by completely different things and require different treatments. Using the wrong treatment will not work, and may delay getting the right one.

Here's how to think about the difference.

What Causes Each One

Yeast infection (candidiasis): Caused by an overgrowth of Candida fungi — most commonly Candida albicans. Candida normally lives in small amounts in the vagina. When conditions change (antibiotics that kill protective bacteria, hormonal changes, high blood sugar, a weakened immune system), Candida can overgrow and cause symptoms.

Bacterial vaginosis (BV): Caused by an imbalance in vaginal bacteria — specifically, a reduction in protective Lactobacillus bacteria and an overgrowth of other bacteria like Gardnerella. BV is not a sexually transmitted infection, though sexual activity can influence the vaginal microbiome. It's the most common vaginal condition in women of reproductive age.

Key Symptom Differences

| | Yeast Infection | Bacterial Vaginosis |

|---|---|---|

| Discharge | Thick, white, clumpy ("cottage cheese") | Thin, white or gray, watery or milky |

| Odor | Little to none | Strong "fishy" smell, especially after sex |

| Itching/burning | Usually significant | Usually mild or absent |

| Redness/irritation | Common | Less common |

| Vaginal pH | Normal (acidic) | Elevated (more alkaline) |

The most distinguishing features are:

• Discharge texture: Thick and clumpy = yeast. Thin and watery = more likely BV.
• Odor: A strong fishy smell is characteristic of BV. Yeast infections rarely have significant odor.
• Itching: Intense itching is much more typical of yeast than BV.

Why Getting It Right Matters

Antifungal medications (fluconazole orally, or miconazole/clotrimazole topically) treat yeast infections but have no effect on BV.

Antibiotic medications (metronidazole or clindamycin, available as oral pills or vaginal gel/cream) treat BV but have no effect on yeast — and antibiotics can actually trigger or worsen yeast infections by disrupting the vaginal flora.

Using an OTC yeast treatment for BV = no improvement, and possibly delayed treatment and antibiotic resistance concerns if overused.

When to See a Physician

The clearest indication to get professional evaluation rather than self-treating:

• First time experiencing these symptoms — worth confirming the diagnosis
• Symptoms don't improve after treatment — possible wrong diagnosis, or a resistant strain
• Symptoms keep recurring — three or more per year warrants investigation into underlying causes
• Unusual symptoms — anything outside the classic presentation
• Pregnancy — both conditions require specific treatment approaches during pregnancy
• Multiple concurrent symptoms — vaginal symptoms plus pelvic pain, fever, or unusual discharge that's accompanied by other symptoms may suggest something different

Even a telehealth visit can help — while a physical examination is definitive, a physician can take a detailed history and, in many cases, point clearly toward one diagnosis or suggest appropriate next steps.

Other Causes of Vaginal Symptoms

It's worth knowing that yeast and BV aren't the only possibilities. Trichomoniasis (a sexually transmitted infection), contact dermatitis, vaginal atrophy, and other conditions can cause overlapping symptoms. If the presentation doesn't fit classic yeast or BV — or if a standard treatment isn't working — don't keep guessing. A physician can evaluate more thoroughly.

Ready to talk to a real doctor? Get started with Coral Health today.