A sweet taste in the mouth may be due to physiological factors, but it may also be due to diabetes, digestive disorders, and other factors. 1. Physiological factors: a sweet taste in the mouth may be caused by eating a large number of sweets such as cakes and candies, etc., and a large number of sweets in the decomposition of sugar accumulated in the mouth, causing a sweet taste in the mouth. 2. Diabetes mellitus: Diabetes mellitus patients will have abnormal pancreatic secretion function, the body’s ability to control blood glucose decreases resulting in increased blood glucose concentration or diabetic ketoacidosis reaction, may cause a sweet taste in the mouth, accompanied by dry mouth, urination, emaciation symptoms. 3. Digestive disorders: abnormal secretion and abnormal metabolism of various digestive enzymes in the digestive tract, leading to an increase in oral salivary amylase synthesis or metabolism, it is easy to have a sweet taste in the mouth. Due to the cause of sweet taste in the mouth of more reasons, need to be examined by a doctor to give a clear, if it is caused by pathological reasons, need to comply with the doctor’s instructions standardized treatment.