Many women notice an unpleasant odor from their intimate area at some point, and in many cases, it’s not a serious problem. A mild or temporary fishy smell can sometimes appear without any clear cause and may go away on its own.

Often, something as simple as showering and changing into clean underwear is enough to restore your natural scent.

But if the odor doesn’t disappear despite good hygiene, or if it comes along with other unusual signs, it’s important to check with a gynecologist.

When a fishy smell is paired with itching, burning, pain, or unusual discharge, it may point to an infection such as bacterial vaginosis (BV) — the most common cause of this type of odor.

Bacterial vaginosis happens when the normal balance of bacteria in the vagina is disrupted. Typical symptoms include thin gray or white discharge, a strong fishy odor (often worse after sex), and irritation. BV requires medical treatment, usually with antibiotics.

Another possible cause of odor can be sweat buildup, tight clothing, or not changing out of damp clothes, which can trap moisture and bacteria.

In some cases, the smell may be linked to trichomoniasis, a sexually transmitted infection caused by a parasite. This condition also needs proper medication and won’t clear up with home remedies.

A forgotten tampon can also create a strong, rotten odor that may be mistaken for a fishy smell. While the odor often improves after removal, lingering symptoms should still be checked by a doctor.

To help prevent unpleasant odors, experts recommend:

• Gently washing the external area only with warm water and mild, unscented soap

• Avoiding douching and scented feminine products

• Wearing breathable cotton underwear

• Changing out of sweaty or wet clothes quickly

• Using protection during sex to reduce infection risk

While occasional changes in scent are normal, persistent or strong odors shouldn’t be ignored — your body may be signaling that something needs attention.