If the child’s drooling is caused by physiological reasons, no special treatment is needed at this time. Because many children at the age of 4 months have started to have teeth erupting, the child’s drooling is due to the teeth erupting to stimulate the child’s gums, and the child’s mouth bottom is shallow, and its saliva secretion is also more vigorous, which leads to more saliva. At this time, parents do not need special treatment, just bring a small bib to the child to prevent the occurrence of dermatitis caused by the stimulation of the perioral skin by saliva. Secondly, if the child has more saliva and sores inside the mouth, this is caused by stomatitis, parents should promptly take the child for the treatment of mouth sores, such as taking antipyretic drugs, we recommend the use of Pudilan anti-inflammatory oral solution, or give the child a probiotic supplement, such as Mamie’s Love.