Breastmilk can be warmed up when it is half cold, by heating it with warm water or a milk warmer. Breastmilk can be heated when it is cold for the child to eat, pay attention to adjust the appropriate temperature, will not destroy the nutrients in the breastmilk. Breastmilk can be heated in special bottles or milk storage bags under water or by using a milk warmer, paying attention to make the breastmilk heated evenly, and taking care not to use boiling water to heat it up. Half-drunk breastmilk should not be heated in a microwave oven because the microwave oven may destroy the nutrients in the breastmilk. In addition, pay attention to heating as soon as possible to prevent harmful bacteria from multiplying in the breastmilk, the heated breastmilk should be drunk, do not repeat heating, repeated heating of breastmilk will destroy the nutrients in the breastmilk. If your baby drinks heated breastmilk and has diarrhea, abdominal pain and other symptoms, it may be due to the deterioration of breastmilk and other reasons, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to improve the relevant examination, to determine the cause of the symptomatic treatment.