The most common reason your vagina might smell like fish is bacterial vaginosis (BV), which is an imbalance of bacteria in the vagina. BV leads to an overgrowth of "bad" bacteria, which produce a substance called trimethylamine that creates a characteristic fishy odor. Other symptoms may include thin, gray, green, or white vaginal discharge, itching, and burning during urination. BV often requires treatment with antibiotics either oral or vaginal to restore healthy bacteria balance. Other causes of a fishy vaginal smell include sexually transmitted infections like trichomoniasis, which can cause a yellow-green frothy discharge along with itching and painful urination. Poor hygiene, sweat, or urine contamination can also contribute to odor. If the smell is persistent or accompanied by discomfort, itching, discharge, or unusual symptoms, it is important to see a healthcare provider for diagnosis and appropriate treatment. Avoid douching or using harsh soaps, as these can worsen bacterial imbalances. In summary, a fishy vaginal smell most commonly signals bacterial vaginosis but may also indicate other infections or hygiene issues. Seeking medical evaluation for proper diagnosis and treatment is recommended to maintain vaginal health.