Published on: 3/17/2025
A fishy smell often points to bacterial vaginosis, an imbalance of bacteria in the vagina, and it’s a sign you should get checked by a healthcare provider.
If your vagina smells like fish, it might be due to a common infection called bacterial vaginosis. In this condition, the balance of bacteria in your vagina changes, leading to the production of a substance called trimethylamine that gives off a fishy odor. First, notice if you have any other symptoms like itching, burning, or unusual discharge. Keeping the area clean with warm water is okay, but avoid harsh soaps or douches that could further disturb the natural balance of bacteria. The best next step is to contact a healthcare provider who can properly examine you, perform necessary tests, and determine if bacterial vaginosis or another condition is present. If it is bacterial vaginosis, your provider might recommend antibiotics, which help restore the normal balance of bacteria. Taking care of these symptoms early helps prevent any complications and keeps you healthy.
(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.
Li M, Al-Sarraf A, Sinclair G, Frohlich J. Fish odour syndrome. CMAJ. 2011 May 17;183(8):929-31. doi: 10.1503/cmaj.100642. Epub 2011 Mar 21. PMID: 21422137; PMCID: PMC3091902.
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