Whether or not you can breastfeed after 24 hours of breastfeeding with a fever hangnail and drinking plenty of water is determined by the medication. If breastfeeding fever hangnail infusion penicillin class, metronidazole class drugs, usually after 24 hours before you can breastfeed, if the infusion of of oxfloxacin class drugs, you need to 72 hours before you can breastfeed. Breastfeeding fever infusion of penicillin drugs, usually does not affect the development of the baby through the milk, usually after an interval of 4 hours can be breastfeeding; if the infusion of metronidazole drugs, it is recommended that 24 hours and so the drug metabolism is complete before breastfeeding, so as not to have an impact on the baby’s body. If a breastfeeding woman is infused with ofloxacin, it is recommended to breastfeed after 72 hours when the drug is completely metabolized, otherwise it will affect the fetal bone development. When fever occurs in breastfeeding women, medication should be administered under a doctor’s diagnosis so as to minimize the impact on the baby.