There are many causes of dry mouth in diabetic patients, and the root cause needs to be clarified. If the dry mouth is caused by elevated blood sugar, it can be relieved by increasing water intake and medication. 1. Increase the amount of drinking water: diabetic patients with dry mouth is mainly due to elevated blood glucose in the body, elevated blood osmotic pressure will make the patient often feel dry mouth, it is recommended to drink more water to improve the symptoms of thirst. 2. Medication: At the same time, it is necessary to use medication to lower blood sugar under the guidance of a doctor, and common hypoglycemic drugs include metformin, acarbose, insulin and so on. Common hypoglycemic drugs include metformin, acarbose, insulin, etc. If diabetic patients have persistent dry mouth, it is recommended to improve the examination and treatment under the guidance of a doctor to exclude dry syndrome and other diseases.