Many women experience an occasional fishy odor coming from their intimate area, and while it can be uncomfortable, it’s not always a cause for concern. In some cases, the smell occurs without any clear reason and may resolve on its own with simple hygiene practices like changing into clean underwear after showering.

However, if the odor persists despite good hygiene or is accompanied by symptoms like itching, pain, or unusual discharge, it may indicate a medical issue. One of the most common causes is bacterial vaginosis (BV), a condition that arises when the natural balance of bacteria in the vagina is disrupted. BV symptoms typically include a thin gray or white discharge, itching, and a strong fishy odor, especially noticeable after sex. This condition requires antibiotics for proper treatment.

In some cases, a fishy or unpleasant odor may also result from poor hygiene, trapped sweat, or wearing tight clothing that doesn’t allow the area to breathe. Proper hygiene and breathable fabrics can usually address this issue.

Another possible cause is trichomoniasis, a sexually transmitted infection (STI) caused by a parasite. This condition also leads to an unpleasant odor and other symptoms but must be treated with prescribed medication—not home remedies.

An often overlooked cause is forgetting to remove a tampon, which can result in a strong, rotten smell. While sometimes mistaken for a fishy odor, this can be particularly intense and should be addressed promptly.

To help prevent vaginal odors, it’s important to maintain gentle hygiene by using warm water and mild soap on the external genital area, avoiding douching and scented products, wearing cotton underwear, and practicing safe sex. If symptoms persist, consulting a gynecologist is the best course of action to rule out infections or other health issues.