Fishy Odour After Sex? Here’s What Your Vagina Is Trying to Tell You!

Noticing a fishy vaginal odour after sex can be concerning, but it’s more common than you might think. While a mild odour after intercourse is normal due to mixing bodily fluids, a strong fishy smell can indicate an underlying issue. Understanding the causes can help you address the problem and maintain a healthy vaginal environment.

Common Causes of Fishy Vaginal Odour After Sex

  1. Bacterial Vaginosis (BV)

    Bacterial vaginosis is the most common cause of a fishy vaginal odour, especially after sex. BV occurs when the natural balance of bacteria in the vagina is disrupted, leading to an overgrowth of harmful bacteria.

    Symptoms of BV

    • Fishy smell, which worsens after sex
    • Thin, grayish-white vaginal discharge
    • Mild itching or irritation

    Why BV Smells Worse After Sex

    Semen has an alkaline pH, which can mix with vaginal fluids and intensify the odour caused by BV.

  2. Trichomoniasis (Trich) – A Sexually Transmitted Infection (STI)

    Trichomoniasis is a common STI caused by a parasite. It can produce a strong, fishy vaginal odor after sex.

    Symptoms of Trichomoniasis

    • Yellow-green, frothy discharge
    • Strong fishy smell
    • Vaginal itching and irritation
    • Pain during urination or sex

    Trich is treatable with antibiotics, so if you suspect it, visit a doctor for testing and treatment.

  3. Semen Mixing with Vaginal Fluids

    Even if you don’t have an infection, semen can temporarily change the vaginal pH, causing a different or stronger odour. This usually resolves on its own within a few hours.

  4. Poor Hygiene or Retained Foreign Objects

    Forgotten tampons, condoms, or even menstrual cups can trap bacteria and lead to a foul smell. If you notice a sudden, strong odour, check for any retained objects and remove them immediately.

  5. Sweating & pH Imbalance

    Tight clothing, poor hygiene, or excessive sweating can create a warm, moist environment where bacteria thrive, leading to unpleasant odors.

How to Prevent & Treat Fishy Vaginal Odor After Sex

  • Practice Good Hygiene – Wash your genital area daily with mild, unscented soap and warm water. Avoid douching, as it can disrupt your natural vaginal flora.
  • Wear Breathable Cotton Underwear – This helps reduce moisture buildup and bacterial growth.
  • Pee & Clean Up After Sex – Urinating after intercourse can help flush out bacteria and reduce the chances of infections.
  • Use Condoms – If semen alters your vaginal pH, using condoms can help maintain a balanced environment.
  • See a Doctor If Symptoms Persist – If the odor is persistent or accompanied by unusual discharge, itching, or burning, seek medical advice. BV and trichomoniasis require antibiotics for proper treatment.

Final Thoughts

A fishy vaginal odour after sex is often a sign of an imbalance or infection, such as BV or trichomoniasis. While occasional odor changes are normal, persistent or strong smells should not be ignored. Maintaining vaginal health through hygiene, safe sex, and regular check-ups can help prevent and treat these issues effectively. If you’re unsure, consulting a healthcare provider is the best course of action

Recent Posts