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Vaginal & vulval health · 5 min read

Why does my discharge smell? Causes and what to do

A mild natural scent is normal, but a strong or fishy vaginal odour can signal an imbalance or infection. Here's what causes it and how it's treated.

Dr Amelia HartleyUpdated July 2026
Medically reviewed by Dr Amelia Hartley, AHPRA-registered GP — Last reviewed July 2026
Why does my discharge smell? Causes and what to do

Some scent is normal

The vagina has a natural, mild scent that varies through your cycle, after exercise, and around your period. A subtle, slightly musky or tangy smell is normal and healthy. It's a strong, new, or unpleasant odour — especially a fishy one — that's worth paying attention to.

Importantly, you don't need scented washes, douches or 'feminine hygiene' sprays. These often make things worse by disrupting the vagina's natural balance.

Common causes of a strong smell

The most common cause of a fishy-smelling discharge is bacterial vaginosis (BV), an imbalance in the vagina's normal bacteria. It often comes with a thin grey-white discharge and is more noticeable after sex. Thrush can cause a yeasty smell with itching and thick white discharge. Some STIs, like trichomoniasis, cause an odour too.

A forgotten tampon is another surprisingly common cause of a sudden strong smell — worth checking.

What to do

Avoid douching and scented products, wear breathable cotton underwear, and see a GP rather than trying to mask the smell. BV and thrush need different treatments, and STIs need specific ones, so getting the right diagnosis (often with a simple swab) matters.

This is very common and treatable, and nothing to be embarrassed about. A telehealth consult is a private way to describe your symptoms, arrange any testing, and get the right treatment.

References & sources

This content is general information and not a substitute for individual medical advice. Please consult a GP for your personal situation.

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