Smelly leukorrhea is usually a sign of vaginitis, which is normally a white, thin, pasty liquid with no odor. When the leukorrhea becomes smelly, it often indicates the possibility of bacterial vaginosis. Bacterial vaginosis is caused by a decrease in the amount of lactobacilli in the vagina, which disrupts the acidic environment of the vagina and leads to a dysbiosis of the vaginal flora. When the vaginal flora is dysbiosis, the leukorrhea often changes in character or color, and even has a fishy odor. The odor of the leukorrhea is often aggravated after sex, and itching and burning pain in the vulva even occurs. Bacterial vaginosis can be treated with oral nitrazoles or vaginal suppositories of metronidazole. Avoid sexual intercourse during the acute inflammatory period. You need to pay attention to vulvar hygiene and wear air permeable underwear.