If a 4-month-old baby has frequent drooling symptoms, it is possible that the baby is about to erupt teeth. In the process of tooth eruption, the salivary glands will secrete a lot, parents do not have to worry too much, you can moderately give the baby grinding tools, such as teething sticks, etc., will increase the speed of the baby’s teeth eruption, as well as reduce the degree of difficulty of eruption. Therefore, it is normal for a 4-month-old baby to drool. Parents should pay attention to keeping the mouth clean and scrub the dental bed with gauze after eating sweets and milk to facilitate the eruption of the baby’s teeth. Be well prepared and wait for the teeth to erupt correctly.