Lactating women with fever can be seen in the department of infectious diseases. Lactating women with fever should have relevant laboratory tests to clarify the cause of the fever and give symptomatic medication. At the same time, if a breastfeeding woman has a fever, it is better not to use antipyretic drugs if it is not necessary. During the treatment period, patients are advised to drink more water, take more rest and increase nutrition, while minimizing access to public places. If medication is needed, try to use drugs that do not pass through the secretion of breast milk to reduce the effect of drugs on the newborn, and if necessary, suspend breastfeeding. With the effective medication symptoms will gradually improve and achieve the purpose of recovery.