Newborns can be given a few sips of warm water initially after half an hour of birth. If the mother’s breast milk is sufficient, no additional water is usually needed up to 6 months of age if there are no special circumstances. Newborns can drink water after birth, but if they are breastfed, there is no need for additional hydration because 80%-90% of breast milk is composed of water. When there are special circumstances, such as fever and sweating, the amount of water can be increased. In contrast, newborns who are fed artificially need to be hydrated, usually about half an hour after feeding, and the amount of water fed should not exceed 1/3 of the amount of milk powder, so as not to increase the burden on the kidneys. Infants 4 months after the addition of complementary foods and then according to the child to add complementary foods, gradually feed water to avoid its fire. In addition, parents need to pay attention to the best for the child’s regular physical examination, to avoid malnutrition. At the same time, the addition of complementary foods should be from less to more, from less to more, from thin to thick, in line with the principle of gradual increase.