Sweet saliva may be related to eating sweets, or it may be caused by digestive disorders or diabetes. 1. Eating sweets: If you have just eaten sweets, such as cakes and candies, the sugar in them may remain in your mouth, resulting in sweet saliva; 2. Digestive system dysfunction: If the digestive system is dysfunctional, resulting in abnormal secretion of digestive enzymes, sweet saliva may occur; 3. diabetes: if you have diabetes, the increase in blood sugar may increase the sugar content in saliva, resulting in sweet saliva. Saliva is sweet suggest actively go to a professional hospital, a clear diagnosis, if the disease factors lead to, must actively follow the doctor’s instructions for treatment, so as not to delay the condition.