If you have mycosis vaginalis during breastfeeding, you can use nifurtimox to insert into the vagina for treatment. Nifurtimox will not affect the breast milk during breastfeeding, and the baby will not be affected by eating this breast milk, so you can apply it safely. During the medication period: 1. do not have sex. 2. pay attention to the diet not to eat spicy and sour stimulating food. 3. be sure to keep the vulva locally clean. When the corresponding symptoms, such as vulvar itching, increased vaginal discharge, yellow color, tofu-like discharge and other symptoms have disappeared, stop the drug 3-7 days can go to the hospital for the corresponding re-examination, to understand whether the mold has turned negative, three consecutive leucorrhea tests are negative before you can stop using the drug, if there is a positive result of the leucorrhea, to continue to use the drug for treatment.