If you drink a lot of water and still have a dry mouth, the first thing to consider is that there is chronic inflammation in the oral cavity, which in Chinese medicine means that you are on fire, and if you don’t have oral problems, you should consider whether you have diabetes. For this disease, first go to the hospital for blood sugar and urine sugar tests, and thyroid tests. If the examination is okay, go to the regular hospital stomatology department to see if the chronic inflammation of the oral cavity and oral dryness, if the chronic inflammation of the oral cavity need to drink more water, avoid spicy and irritating food, eat more fruits and vegetables, can eat Chinese medicine regulation. Rinse more mouth, brush teeth, most of the chronic disease, need a long time conditioning, do not stay up late. You can also use humidifier indoors, reduce the intake of salt, and prohibit smoking and alcohol. If it is dry syndrome, it is necessary to pass professional mucous membrane examination to further clarify the causative factors and observe the damage of submucous membrane, so go to regular hospital for examination, apply suitable anti-bacterial and anti-viral drugs for treatment, and combine Chinese and Western medicine to balance the functions of five organs and six internal organs and improve the resistance of the body. Usually, you can also use food therapy, boil pear with sugar water, or you can cut open the pear, put icing sugar in the middle and steam it for consumption.