What could cause white vaginal discharge to smell?

When the normal balance of good bacteria in the vagina changes, a condition called bacterial vaginosis can develop. In this condition, the numbers of bacteria that help protect the vagina drop, and other bacteria that produce a strong chemical called trimethylamine can grow. This chemical often causes a fishy smell in the discharge. Sometimes, other infections like trichomoniasis might also cause an odor and other symptoms like itching or irritation. Yeast infections mostly lead to thick, white, cottage cheese–like discharge and typically do not have a strong smell. However, if you notice a new or unusual smell along with white vaginal discharge, it might be because the balance of bacteria in the vagina is off, leading to the production of the odor-causing chemical. If you're experiencing these symptoms and want to better understand what might be causing them, you can check your symptoms with Ubie's free AI-powered tool before talking with a health care provider about any concerns regarding changes in vaginal discharge or smell.