It is possible to use medications for vaginal infections during breastfeeding because many medications may be absorbed by the baby through the breast milk and may have adverse effects on the baby. During breastfeeding, medication should be used with caution and under the guidance of a doctor. If the infection is caused by bacterial vaginitis, you can use metronidazole suppositories, both of which can be used to wash the vulva with water, or use Baiyai lotion, red nucleus lotion, etc.