Breast milk after secondary heating is generally not recommended to be fed to children. On the one hand, the nutrients in breast milk will be rapidly destroyed with the increase of heating times, making the nutritional value of breast milk decrease significantly. Frequent feeding of second heated breastmilk to babies will easily lead to deficiency of various nutrients and affect the physical and intellectual development of babies. On the other hand, heated breast milk is more prone to deterioration and is easily contaminated by microorganisms during the process of storing it again, and feeding it to babies after reheating it can easily lead to gastrointestinal diseases. In the process of storing breast milk, it is recommended to take small packages as much as possible, and before feeding your child, you should thaw and heat the right amount of breast milk according to the amount of food your child eats to avoid wasting.