Under normal circumstances, breastfed children do not need to drink extra water, because more than 80% of the ingredients in breast milk are water. If the child is formula-fed, he or she needs to drink extra water, usually about half an hour after feeding. Newborns generally drink about 15-20 ml of water, and as the age grows, the amount of water drunk gradually increases, with individual differences in the amount. To determine whether the amount of water to drink is appropriate, mainly depending on the urine, the general number of times a child urinates in the newborn period is more than 10 times a day, mixed feeding children drink water as appropriate, if the child has a fever, vomiting, diarrhea or hot weather, the amount of water to drink should be increased accordingly to avoid dehydration of newborns.