Breastmilk expressed immediately and eaten right away does not need to be heated. Breastmilk is the most ideal natural food for infants, its nutrients are the most suitable for infants to absorb and utilize, which is conducive to growth and development; moreover, it can be adjusted with the growth of infants and the composition of milk. Numerous studies have shown that exclusive breastfeeding from 0 to 6 months after birth can meet the growth and development needs of most infants. Breastmilk has a constant and moderate temperature, is clean and hygienic, and has no possibility of being contaminated during artificial feeding. Immediately expressed breast milk is a certain temperature, immediately give the child to eat is not need to heat, will not cause some stimulation of the child’s gastrointestinal tract. If expressed breastmilk has been left for some time, it is advisable to warm it up to about 40°C to avoid irritation of the child’s gastrointestinal tract caused by the coldness of the breastmilk. Whether you are giving your child breast milk or formula milk, you need to be careful not to let your child eat cold food. The best temperature for heating breastmilk is about 40℃, which will not cause irritation to the child’s gastrointestinal tract and will not destroy the nutrition of breastmilk because of the high temperature.