Fishy odor in the lower body is usually due to bacterial vaginitis or pelvic inflammatory disease, preferred nitroimidazole antibiotics, such as metronidazole, tinidazole and so on. Typical symptoms of bacterial vaginal inflammation are grayish white or light green thin and large amount of leukorrhea, fishy odor, and occasional vulvar itching symptoms. It is mainly caused by dysbiosis in the vagina and can be diagnosed through leukorrhea tests. Bacterial vaginitis mainly use vaginal plugs, such as metronidazole suppositories, ornidazole suppositories and so on. If you do not have sex or vaginal plugging is inconvenient, you can use nitroimidazole drugs under the guidance of a doctor, such as metronidazole tablets, tinidazole tablets, etc., if necessary, combined with other antibiotics, such as cefixime, cefuroxime, etc., or levofloxacin and other drugs. Fishy odor in the lower body may also have other reasons, it is recommended that the above symptoms in time to go to the hospital, not to use their own medication, to avoid the medication does not lead to adverse consequences.