Sweetness in the mouth may be caused by eating a lot of sweet food, diabetes, indigestion, etc. You need to take metformin, domperidone and other medications to treat the cause. 1. Eating a lot of sweet food: After eating too much sugar cane, candies, candy canes, desserts and other foods with high sugar content, the food residue remains in the mouth, so the mouth feels sweet, which is a physiological phenomenon and does not require special treatment. 2. Diabetes: diabetic patients with high blood glucose and other glands in the salivary glands of the glucose content will rise accordingly, a large number of glucose-containing saliva secretion into the mouth, resulting in the mouth feel sweet. You can take metformin, dagliflozin and other drugs, or subcutaneous injection of insulin hypoglycemic treatment, and with diabetic diet and reasonable exercise. 3. indigestion: overeating, cold food stimulation, gastrointestinal cold and other factors lead to abnormal gastrointestinal peristalsis, indigestion and sweetness in the mouth, you can take gastrointestinal tablets, domperidone, mosapride and other drugs. Note that you need to use the drug under the guidance of a physician.