If a woman has a fishy odor from the vulva, the most common cause is inflammation, and it is a bacterial vaginosis caused by anaerobic bacterial infection, so there is often a fishy discharge, which is also accompanied by increased discharge, yellowish color, and relatively thin discharge, which can be treated with metronidazole. If the odor of the discharge is not eliminated by metronidazole treatment, endometrial cancer and cervical cancer should be ruled out clinically because both of these cancers of the reproductive tract may cause the discharge to have a very foul odor and may manifest as a bloody discharge or a discharge like slop, which should be taken seriously. It is recommended that women have an annual health checkup to find out if there is cancer of the cervix and to find out if there is endometrial lesion, etc.