Drooling can be caused by a variety of reasons, and the common reasons are as follows. First, poor oral hygiene, the temperature and humidity in the mouth is the most suitable for the reproduction of bacteria, so that it is easy to appear on the oral diseases, such as dental caries, periodontal disease, there will be drooling. Second, the front teeth deformity, this may be caused by genetic factors, but also may be caused by acquired bad habits. For example, gnawing nails, spitting tongue or biting pencils, etc., this will also appear in the anterior teeth deformity, drooling. Third, neuromodulation disorders, the regulation of salivary secretion, is entirely neurological reactive. This will appear the symptoms of drooling. The first way to prevent and control is to pay attention to oral hygiene, and develop the habit of brushing teeth in the morning and evening and rinsing the mouth after meals. It is also possible to consult an oral surgeon for a better method of treatment. In addition, you can take oral medications such as vitamin C and B2 to eliminate gingivitis and reduce the adverse effects. There are also some diseases, such as gastrointestinal diseases, reflux esophagitis can also cause the symptoms of drooling, these need to check the electronic gastroscopy to clarify the examination, in order to do symptomatic treatment. The above content is for reference only, specific medication, treatment guidance please refer to the doctor’s visit.