A foul odor in the leukorrhea is usually suggestive of vaginitis. A foul odor is commonly associated with trichomonas vaginitis, bacterial vaginitis, or a tendency to malignancy. The first is a watery leucorrhea with a typical fishy odor and itching, suggesting that vaginitis belongs to trichomonas, treatment can be gynecological cleansing, metronidazole suppositories, tinidazole suppositories for external use, and metronidazole tablets, tinidazole tablets for oral use. The second, bacterial vaginitis, common leucorrhea is yellow and sticky, with odor, treatment can be gynecological clean wash, ciprofloxacin suppositories for external use, and then oral cephalosporin and penicillin anti-inflammatory drugs, and then symptomatic treatment. Third, there is a tendency of malignant tumor, malignant tumor will appear with a large amount of watery secretions and foul odor. You must go to the hospital for cancer screening to see if there are any problems. Therefore, most of the foul-smelling leukorrhea is caused by trichomonas infection, which can be relieved by symptomatic treatment of trichomonas infection. If there is any abnormality, you must go to the hospital for a routine examination and then treat the problem according to the examination results.