Frozen or refrigerated breastmilk can only be heated once, and breastmilk that has been heated once cannot be heated again. When feeding your child with frozen or refrigerated breastmilk, you should heat the breastmilk in an appropriate amount according to the amount your child usually eats, so that the amount of breastmilk heated at one time is just enough for your child to eat at one time. If you can’t finish the heated breast milk at once, you should drink the rest within 1-2 hours. After 2 hours, it should be dumped and discarded. Reheating heated breastmilk will lead to nutrient loss, which is detrimental to your baby’s growth and development; on the other hand, it will increase the chance of contamination and make you susceptible to digestive diseases, causing nausea and vomiting. When storing breastmilk, it is best to use a small package to store it, and when heating the milk, it should be less not more.