A 2-month-old baby fed only breastmilk can generally not need to drink water, unless the baby is sick, such as colds, gastrointestinal diseases, and so on. Breastfeeding for 2 months old babies usually do not need to drink water, because breast milk contains a lot of water, enough to replenish the baby’s body loss of water, if the baby intake of too much water, but will increase the burden on the baby’s kidneys, and in serious cases even lead to the baby’s kidney failure. When the baby is sick such as cold and fever or gastrointestinal tract will need to intake of water to replenish the baby extra loss of water. Does the baby need to replenish water, parents can observe whether the baby urine yellow, urine less dry lips, etc., such as the appearance of the above performance can be given to the baby to drink a moderate amount of water.