Watery leukorrhea with a foul odor may be caused by trichomoniasis, bacterial vaginosis, etc. You can use metronidazole drugs, cephalosporin drugs, etc. 1. Trichomonas vaginitis: the leukorrhea is watery, thin, foamy, fishy odor, itchy symptoms, etc., suggesting trichomonas vaginitis, you can eat metronidazole tablets, tinidazole tablets, etc., plus the vaginal use of metronidazole suppositories, or metronidazole vaginal effervescent tablets, etc., treatment. 2. Bacterial vaginosis: Leukorrhea is yellow, sticky and purulent, or yellow-green, thin and watery, with a foul odor. After diagnosis of bacterial vaginosis, you can use metronidazole plus cephalosporins, or metronidazole plus quinolones combined treatment. All of the above medications should be used under the guidance of a doctor, avoid self-medication to avoid adverse consequences.