Eight-month-old babies generally do not need to drink extra water after eating formula, because drinking water will occupy the baby’s stomach capacity, resulting in a reduction in milk and calorie intake, which in the long run may affect growth and development, but it’s okay if you only drink water occasionally. Generally speaking, eight-month-old babies are mainly breastfed or formula milk, and have been added a small amount of complementary foods. Since complementary foods and milk contain a lot of water, so generally do not need additional water supplementation, drink milk and eat complementary foods can be. Excessive water intake may easily lead to insufficient milk and calorie intake, which will affect the growth and development of the baby, so routine hydration is not recommended. However, if the baby drinks a few milliliters of water after drinking milk, moisturize the lips is also perfectly fine, parents do not need to worry too much.