Excessive salivation may be a physiologic increase in salivary secretion, and pathologic diseases may include oral inflammation, cerebrovascular disease, and so on. 1. Physiologic increase in salivary secretion: When eating, especially when encountering acidic food, and when children’s teeth are erupting, excessive salivation may occur. 2. Oral inflammation: periodontal disease, dental caries and other oral inflammation may also appear increased saliva secretion. 3. Cerebrovascular diseases: Cerebrovascular diseases such as cerebral palsy may be associated with abnormalities in oropharyngeal and facial muscle activity, resulting in hypersalivation. Drooling may also have other pathological factors, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.