The yellowing of a newborn baby’s tongue is likely to be the result of jaundice. Normally, a newborn baby’s tongue is not yellow and should be a light pink color. The yellowing of the tongue of a newborn baby is not solely attributed to jaundice, but may also be caused by milk residue during the baby’s breastfeeding. If the mother’s body shows symptoms of fire, and the newborn baby consumes the mother’s milk, it will show symptoms of fire, resulting in a yellow tongue, feed the baby more water and the symptoms will slowly disappear. If it is jaundice, you can observe if the skin on your face and body is also yellow, and you can make a judgment from these conditions. If it is caused by breastfeeding, the mother should pay attention to the diet, not to eat spicy, stimulating and excessively greasy food, should be light.