Published on: 3/17/2025
Smelly vaginal discharge can often be caused by infections like bacterial vaginosis or trichomoniasis and sometimes other changes in the natural balance of bacteria.
Your body naturally creates vaginal discharge to keep the area clean by washing away old cells and unwanted germs. When the smell becomes strong or unusual, it can be a sign that the balance of good and bad bacteria in the vagina has changed. One common cause is bacterial vaginosis, which occurs when the good bacteria decline and other harmful bacteria proliferate. This condition may give your discharge a fishy odor. Another cause is trichomoniasis, a sexually transmitted infection that can also result in a strong, unpleasant smell, along with changes in the color and texture of your discharge. Other bacterial infections might also change the smell even without other symptoms appearing. It is important to remember that a little odor can sometimes be normal because the smell and consistency of the discharge can change during your cycle or with certain activities. However, if you notice a strong smell that persists or if you have other symptoms like itching or discomfort, it’s a good idea to see a healthcare provider to find out what’s causing the change and the best way to help you feel better.
(References)
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Mulu W, Yimer M, Zenebe Y, Abera B. Common causes of vaginal infections and antibiotic susceptibility of aerobic bacterial isolates in women of reproductive age attending at Felegehiwot Referral Hospital, Ethiopia: a cross sectional study. BMC Womens Health. 2015 May 13;15:42. doi: 10.1186/s12905-015-0197-y. PMID: 25968607; PMCID: PMC4438529.
Sim M, Logan S, Goh LH. Vaginal discharge: evaluation and management in primary care. Singapore Med J. 2020 Jun;61(6):297-301. doi: 10.11622/smedj.2020088. PMID: 32754764; PMCID: PMC7905126.
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