The white tongue of infants is mostly considered to be caused by residues after breastfeeding, as well as diseases such as weakness of the spleen and stomach and indigestion. If it is a residue after breastfeeding, it is normal and will disappear in about four months. If the child has a weak spleen and stomach, indigestion, loss of appetite, lethargy, and poor spirit, accompanied by a white tongue, feed the child more water, you can drink a small amount several times, plain water is fine, especially after breastfeeding to feed some water to clean the mouth, as long as the child does not have fever, crying, generally do not need to deal with. The mother should pay attention to adjusting her diet, prohibit spicy and stimulating food, eat more fruits and vegetables, diversify nutrition, if the child is formula-fed, pay attention to whether the formula has allergens, you can change the formula. You can also give your child some probiotic drugs, digestive drugs, can improve the intestinal flora, help digestion, you can also often massage the child’s abdomen, chiropractic, let the child go out more sunshine, moderate hunger, more exercise, can also improve indigestion. If the child has other changes, it is recommended to take the child to the pediatrician for further blood tests to see if there is anemia, and treat the symptoms under the guidance of the doctor.