If the vaginal discharge has a fishy odor, but there is no vulvar itching, it is mostly due to anaerobic infections, which can be treated with metronidazole or tinidazole. If you are married or have a history of sexual intercourse, you can use metronidazole suppositories, or ornidazole suppositories or tinidazole suppositories, inserted into the vagina for treatment if pregnancy is ruled out. If there is no sexual history of women, you can take oral metronidazole to give the appropriate treatment, will make the fishy odor will be very good improvement. If the clinical symptoms do not improve after three days of medication, we should promptly go to the hospital for examination, because vaginal discharge odor is also commonly associated with cervical cancer, endometrial cancer, so we should check to exclude the possibility of cancer.