Unusual Odor: What a “Fishy Smell” Really Means and When to See a Doctor

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The most frequent cause of a fishy vaginal odor is bacterial vaginosis. BV occurs when the natural balance of good and bad bacteria inside the vagina is disrupted, allowing certain bacteria to overgrow.

Symptoms of BV may include:

  • A thin, gray or white discharge
  • A strong odor, especially after intercourse
  • Mild itching or burning

Bacterial vaginosis is not considered a sexually transmitted infection, but sexual activity can increase the risk. Importantly, BV requires antibiotics to clear up. Home remedies, scented soaps, or over-the-counter treatments will not resolve it.

2. Trichomoniasis

Another possible cause is trichomoniasis, a common sexually transmitted infection caused by a tiny parasite. Unlike BV, this is passed between partners and must be treated with prescription medication.

Trichomoniasis symptoms may include:

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