Newborns drinking breast milk dilution, if it is physiological is normal, pathological such as diarrhea caused dilution is not normal. 1. physiological: newborns gastrointestinal function is not well developed, usually can not completely digest food, so the undigested food will be turned into dilute stool discharge, can be adjusted to the newborn feeding time or the amount of milk per feeding to reduce the dilution of the situation. 2. Pathological: refers to diarrhea, gastritis and other diseases caused by diarrhea, usually newborns in diarrhea accompanied by a large number of symptoms, discomfort, dehydration, fever, etc., this situation should be sent to the hospital in time for treatment. Newborns are delicate in every aspect after birth, and their condition needs to be closely monitored. If there is any obvious discomfort, it needs to be actively diagnosed and treated.