Most of the saliva is normal, may be caused by eating food, use of denture, etc. Individuals may be oral mucosal disease, endocrine disorders and other diseases, it is recommended to go to the stomatology department in time for examination and treatment. Most of the salivation is not a manifestation of disease, but may be caused by eating stimulating food, such as acidic, spicy. Wearing movable denture for the first time may stimulate saliva secretion, especially nervous patients are more prone to salivation. Oral mucosal diseases may cause excessive salivation, such as oral mucosal ulcers. Endocrine disorders may have excessive salivation, such as menopausal syndrome, pregnancy and childbirth. If the saliva is more serious, it is recommended to go to the hospital.