If the tongue is thick, it is usually due to immature development of the digestive system or due to the precipitation of milk when the baby drinks milk for a long time. Immaturity of the digestive system: Because babies are young, all aspects of the system are not fully developed, so it leads to little secretion of gastric acid and digestive enzymes, and the organism secretes very low levels of digestive enzymes, making it difficult to adapt to changes in food. And the baby’s nervous system for the stomach as well as the long does not regulate the function is also very poor, low immunity can easily lead to the symptoms of indigestion, so the baby will show the symptoms of thick tongue. The mother in the breastfeeding period should also pay more attention to the diet, it is recommended to take a light diet, do not eat too greasy food, easy to cause the baby to drink milk after the symptoms of indigestion. Because babies are young, they cannot chew food, so they have to supplement their nutritional needs through milk and milk powder, but because their saliva secretion system is poor and their ability to self-clean their mouths is not well developed, drinking milk for a long time can lead to the accumulation of milk on their tongues, giving them a white and thick feeling. Usually the symptoms of thick tongue are caused by fire or long-term food accumulation, so it is recommended to let your baby drink more warm water.