Metronidazole tablets should not be inserted directly into the vagina because they do not melt easily after being inserted into the vagina, and then they will not be able to achieve the desired effect of the medicine. It is advisable to insert metronidazole suppositories, which contain oil in the production process and are very easy to melt, and after the oil melts in the vagina, it will not play an uncomfortable feeling. Metronidazole tablets are melted over a long period of time, and the tissue of the tablet is discharged, which can have an irritating effect on the vaginal mucosa. You can go to the pharmacy to buy metronidazole suppositories, or compound metronidazole suppositories inserted into the vagina for treatment, it is recommended to be sure to use the medication under the guidance of a doctor, not unauthorized use of medication.