Sweet mouth may be related to physiological reasons such as excessive sugar intake or pathological reasons such as diabetes, digestive system dysfunction. 1. Physiological reasons: If a large amount of food rich in sugar, such as steamed bread, etc., can be broken down into glucose by the enzyme amylase in saliva, you will feel sweet in the mouth. 2. Pathological reasons: if diabetes mellitus blood sugar control is not good, there may be elevated blood sugar, which in turn leads to an increase in salivary sugar, which can be broken down by amylase resulting in a sweet mouth; if the patient’s digestive system is disturbed, there may be an abnormal secretion of digestive enzymes, and when the secretion of amylase is increased, the sensation of a sweet mouth may occur. Sweet mouth may also have other reasons, it is recommended to go to the regular hospital in time to clarify the cause, if you need treatment, should be standardized treatment under the guidance of the doctor.