The causes of infant drooling are as follows: 1. tooth eruption, when the baby’s teeth erupt, there will often be drooling, and children tend to involuntarily shake their heads, which is a physiological phenomenon. 2. the consequences of stomatitis in infants, after the infant suffers from stomatitis, there will also be drooling, and refusal of milk, children often cry and restless. 3. caused by the child’s mouth bottom is very shallow, the child’s mouth bottom is very shallow, after the salivary glands secrete saliva, this is also a physiological phenomenon. In the future, after the salivary glands secrete more saliva, this time will also appear drooling, especially when the child 3-6 months, this is also a physiological phenomenon.