When a new baby is born, young couples who are first-time parents find it very cute to see their babies spitting out their tongues, but they can’t help but be a little worried. In fact, spitting out the tongue is a normal phenomenon of the baby’s physiological development and parents need not worry too much. The baby’s nervous system develops rapidly after birth, and the order of nerve development starts from the center to the periphery, so the baby’s perioral nerves develop earlier than the nerves in the hands. The mouth is a tool for newborns to explore the world, and babies will explore and experience their surroundings through their mouths. The baby’s salivary glands begin to secrete saliva, the baby will lick it with the tongue, and the situation of spitting out the tongue will occur. Newborn babies often spit out their tongues can also be due to the following reasons: 1. Some babies spit out their tongues just as a habit, which then needs to be corrected with the help of parents. 2, Because the baby’s body temperature is too high or too much saliva, sticking out the tongue will lower the body temperature in the mouth and reduce saliva to give themselves a sense of comfort. 3. It may also be that the body moisture is low and the mouth is too dry, making the baby uncomfortable, so he or she will stick out his or her tongue. At this time, it is necessary to increase the baby’s water intake and the amount of nursing appropriately. In short, parents should pay attention to the baby’s symptoms, when the baby appears to spit out his tongue accompanied by vomiting, diarrhea and other conditions, we should go to a specialist hospital as soon as possible.