Dry mouth has a certain relationship with liver function and may also be related to diabetes and dry syndrome. 1. Liver function: due to long hours of late night, alcoholism, smoking and other bad habits, will slowly destroy the normal function of the human liver, cirrhosis patients with metabolic dysfunction, can also lead to dry mouth and other symptoms. Patients with fatty liver will also suffer from dry mouth due to excessive accumulation of fat in the liver, which affects the body’s metabolism. You should consult a doctor in time and take medication under the doctor’s guidance. 2. Diabetes: diabetic patients with dry mouth, mainly due to poor glycemic control, resulting in increased osmotic pressure caused by increased urination, water loss in the body, resulting in dry mouth, life should limit the intake of sugar, many times a small amount of water. 3. Dry syndrome: Dry syndrome is an immune disease. It is due to the combination of autoantibodies and antigens to induce an immune response, thus destroying salivary glands and secretory glands. Patients mainly manifest dry mouth, swallowing difficulties. In daily life, it is important to avoid light and wind, maintain a moist environment in the room, and avoid going to dry places. There are many reasons for dry mouth, which should be analyzed on a case-by-case basis. If the symptoms are not relieved, you should go to the hospital in time and use medication under the guidance of the doctor.