Salivation in the mouth all the time may be referred to as drooling, which is considered to be related to oral diseases, mental factors, throat diseases and dietary factors. 1. Oral diseases: if there are oral diseases, such as gingivitis, mouth ulcers, the stimulation of inflammation may lead to increased saliva. 2. Mental factors: the usual work and study stress, mental tension, anxiety and depression, resulting in neurosecretory function excitation, may produce a lot of saliva. 3. Diseases of the throat: always have saliva, but also to understand whether it is related to diseases of the throat, such as tonsillitis, pharyngitis, laryngitis, acute pharyngitis, resulting in increased drooling, accumulation in the oral cavity. 4. Dietary factors: If you eat spicy stimulation or acidic, not easily digested food, resulting in acid reflux, patients are prone to increased saliva. Drooling also needs to know whether it is related to swallowing dysfunction, facial nerve paralysis, cerebrovascular disease, etc. It is recommended to go to the stomatology department of the hospital for examination to find out the cause, and treat it under the guidance of the doctor.