If the mouth is sweet, accompanied by obvious hunger and thirst symptoms, which leads to more eating and drinking, and an increase in the volume of urine, and a significant weight loss. For these symptoms to consider the possibility of diabetes, because diabetes can lead to a decrease in the body’s pancreatic islet function or dysfunction, which will increase the amount of sugar in the blood, which also causes the secretion of some sugar in the saliva, resulting in the appearance of this symptom. For this situation, it is advisable to seek medical attention in a timely manner, after a clear diagnosis and timely treatment. 2, to consider whether there is a digestive dysfunction caused by the secretion of various digestive enzymes abnormal, especially the saliva amylase content increases, which leads to the appearance of this symptom. For this cause, it is recommended to try to eat a light diet, less spicy, stimulating food, after a period of adjustment, the symptoms will generally be relieved.