Whether breastfed babies need water or not needs to be analyzed, such as exclusively breastfed babies are usually not recommended to feed water, for babies who gradually add complementary food can be fed water as appropriate. Infants usually refers to babies within 1 year of age, for breastfed babies need to feed additional water needs to be based on the age of the baby and whether to add complementary foods and other decisions. 1. For younger babies who are breastfed, extra water is not recommended because breast milk contains more water to meet the body’s needs, and the baby’s stomach capacity is small, so extra water may affect the amount of breast milk consumed. 2. For the baby has gradually added complementary foods, its digestive tract function continues to improve, may be appropriate to feed water, according to the baby’s digestive tract tolerance can also be given the right amount of fruit juice or vegetable juice and so on. 3. If the baby is in fever, diarrhea and other pathological conditions, or the baby has a dry lip and mucous membrane, sunken eye sockets, urine and other symptoms, it is recommended to go to the hospital as soon as possible, follow the doctor’s instructions for appropriate hydration. It is recommended to consult a specialist for judgment to guide feeding when necessary.