The first thing parents need to look for in an infant with a thick white tongue is whether it is a residue from breastfeeding. If it is a residue of breastfeeding, it does not need to be treated and can usually subside naturally. The thick white tongue is mainly caused by food accumulation, i.e. indigestion, or weakness of the spleen and stomach, mostly manifested as bloating, diarrhea or anorexia. At this time, we must pay attention to reasonable breastfeeding, do not give the baby too much at once, if you eat breast milk too fast and too much at once, or eat milk powder too fast and too much, it is easy to have indigestion, thick white tongue coating, and white incompletely digested milk flaps can be seen in the stool. When your baby often spills milk, reduce the amount of breast milk or formula feedings. If there is only a thick white tongue coating without other symptoms, it is suspected to be a sign of fire. Formula-fed babies need to drink more water and eat more vegetables and fruits to prevent symptoms such as fire. Secondly, the interval between feedings can be extended appropriately, usually 3-4 hours, to avoid babies eating too much at once. If the infant’s development is delayed or the weight growth is not good, the feeding amount should be adjusted in time to reduce the occurrence of thick white tongue.