Sweet mouth may be due to eating too much sweets, diabetes, indigestion, etc. You need to take drugs such as metformin and domperidone for the cause of the disease, and no drugs are needed for physiological reasons. 1. Eating too much sweet food: After eating a lot of candy, desserts, fruits and other sugar-rich sweets, food residues remain in the mouth, so the saliva will be sweet. This is a physiological phenomenon, no need to take medication, repeated gargling can be. 2. Diabetes: patients with this disease due to insulin resistance and (or) insulin sensitivity is reduced, resulting in high blood glucose levels, a large amount of glucose through the saliva secretion, resulting in sweet saliva. You can take metformin, dagliflozin, biagliflozin and other drugs to treat it. 3. indigestion: overeating, gastrointestinal cold, mental stress and other factors lead to gastrointestinal peristalsis, indigestion and food stagnation, salivary amylase and other digestive enzymes secretion increases, so the saliva will be sweet. You can take gastrointestinal tablets, domperidone, mosapride and other medications. Note that the medication should be used under the guidance of a physician.