Breastfeeding fever has more effects on the child, mainly in the following aspects: most fevers during breastfeeding are caused by infection, pathogenic bacteria are easily excreted through the respiratory air bubbles, and breastfeeding is relatively close to the child, which can easily lead to cross-infection, especially fevers caused by respiratory tract infections. Some fevers may be caused by mastitis or breast abscesses, where pathogenic bacteria are easily excreted through the breast and breast milk, thus infecting the child, and should be observed and breastfeeding should be suspended if necessary. When a high fever occurs, antipyretic drugs may be taken, which may be excreted through the breast milk and affect the child’s health, such as causing abnormalities in the child’s liver and kidney functions, but the probability of occurrence is relatively low. Some patients may take other medications that may also affect the child, and it is necessary to choose whether to continue breastfeeding or not depending on the medication consumed. Some patients may have fever caused by specific pathogenic bacteria, such as HIV and syphilis spirochete virus, which may be excreted through breast milk and lead to infection and serious infection or even death. In case of fever, it is recommended to decide whether or not to continue feeding, and if necessary to suspend feeding, depending on the cause of the fever and whether or not medication is being taken.