Published on: 3/17/2025
A strong odor in your vaginal area is often due to a change in the balance of bacteria, like in bacterial vaginosis, which can make your discharge smell fishy.
Your vagina has a natural mix of good bacteria that help keep it healthy. When this balance changes, sometimes an infection like bacterial vaginosis can occur. In bacterial vaginosis, the numbers of good bacteria drop and other bacteria take over, producing chemicals like trimethylamine. This chemical is known to give off a strong, fishy smell. The odor can be noticeable even if there is not a lot of extra discharge or if you don’t feel pain. Sometimes other very mild changes in your body or hygiene habits might also lend a stronger odor, but infections are one of the common reasons for a strong smell. Getting a checkup with a healthcare provider can help to confirm if the problem is bacterial vaginosis or something else. They can do simple tests and, if needed, give you the right treatment to help bring back a good balance of bacteria, making you feel healthy and comfortable.
(References)
Brand JM, Galask RP. Trimethylamine: the substance mainly responsible for the fishy odor often associated with bacterial vaginosis. Obstet Gynecol. 1986 Nov;68(5):682-5. PMID: 3763085.
Cologne, Germany: Institute for Quality and Efficiency in Health Care (IQWiG); 2006-. Bacterial vaginosis: Learn More – Which treatments are effective in bacterial vaginosis? [Updated 2022 Apr 4]. Available from: https://www.ncbi.nlm.nih.gov/books/NBK298830/
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