The odor at the bottom indicates ectopic vulva. Most of this condition is caused by vaginitis, bacterial vaginitis and trichomonas vaginitis, the vulva odor is more serious. 1. trichomonas vaginitis, mainly manifested as purulent leucorrhea, increased amount of leucorrhea, and obvious vulvar itching, the odor is usually foul smell, need to be treated with metronidazole. 2. bacterial vaginitis, vulvar itching is not very obvious This kind of vaginitis can be treated with clindamycin or metronidazole, but the leucorrhea is increased, yellow and has a fishy odor. In addition, you should keep your vulva clean and wash it with warm water every night, not douching. Excessive sexual intercourse can also cause vaginitis. 2-3 times a week is more appropriate for sexual intercourse.