Dry mouth at night is usually caused by patients breathing with their mouths open, mostly due to rhinitis, adenoid hypertrophy, deviated nasal septum and other diseases that make patients sleep with their mouths open at night instead of breathing through their nasal passages. The first is that the patient’s mouth will be open to breathe, and the second is that the body’s saliva will be physiologically reduced at night.
Some diseases can also cause dry mouth at night, such as diabetes, because people with diabetes urinate a lot and lose a lot of water in their bodies. The most important thing is that the patient’s body has a high rate of metabolism, which can cause more water to evaporate from the body. At the same time, the patient drinks too little water at night, which results in a dry mouth at night. In addition, if you take drugs to relieve smooth muscle spasms at night, you are also prone to have a dry mouth.