A newborn baby with yellow water may not necessarily be cold, but may also have diarrhea from various causes. The common cause of yellow water in newborns is indigestion, which may be related to breastfeeding mothers who have eaten foods that are difficult to digest or irritating. If the baby is artificially fed, it is also possible that the formula is too thick causing the baby to accumulate food. In addition, improper care can cause the baby’s abdomen to catch a cold, which can also cause diluted yellow water. Some children may also have diarrhea caused by viral or bacterial infections. In addition, parents are advised to pay attention to the baby’s abdomen to keep it warm, and if it does not improve, they need to seek medical attention in time to avoid life-threatening dehydration caused by diarrhea, and to do routine stool examination to clarify the diagnosis and carry out symptomatic treatment.