The following are some of the cases of sweet mouth: 1. digestive disorders, which lead to abnormal secretion of digestive enzymes and increase the amount of amylase in saliva, so you will feel sweet mouth. 2. diabetes, diabetes patients with high blood sugar concentration in the body, saliva will also increase the amount of sugar, so you will feel sweet mouth. 3. spleen and stomach heat steam, spleen and stomach heat steam because usually like to eat spicy, stimulating food, and excessive damp heat in the body, in addition to the symptoms of sweet mouth. 4. The symptoms of sweet mouth, thirst, water, dry stool, sores on the tongue, easy hunger, weakness, etc. 4, weakness of the spleen and stomach, caused by age or long-term sickness injury to the spleen and stomach, manifested as weakness, appetite, sweet mouth, dry mouth, etc. If you feel sweet mouth can go to the hospital for a checkup to identify the cause and treat the symptoms.