If a woman has a bad smell down there, it may be caused by some gynecological inflammation. Pay attention to whether the color of the leucorrhea is normal and whether there is vulvar itching. A normal white belt is white and has no odor. If you find abnormal leucorrhea, you can go to the hospital for a routine vaginal discharge test to check whether there is vaginal inflammation. If the vulva itches a lot, the leucorrhea is yellow-green and foamy, and there is a fishy smell, it may be trichomoniasis, which needs to be treated at the same time by the couple, otherwise it is likely to recur. If the itching is not obvious and the leucorrhea has a fishy smell, it may be bacterial vaginitis, which can be treated by inserting some beneficial probiotics into the vagina or by inserting antibiotic suppositories into the vagina. If the white belt routine examination is normal, women with a history of sexual intercourse should be checked for cervical inflammation.