There are many reasons for dry mouth at night, and there are different treatments for different reasons. 1. Dry mouth caused by dry indoor air can be relieved by placing a humidifier: If you sleep in a high ambient temperature, the moisture in the indoor air will evaporate faster, resulting in drier indoor air and thus dry mouth at night. You can use a humidifier to increase the humidity and relieve dry mouth at night. 2. Dry mouth caused by dietary discomforts can be relieved by improving your diet: if you eat too much spicy food before going to bed at night or during the day, it can lead to dry mouth at night. Symptoms can be relieved by consuming enough water or cutting down on spicy foods. 3. Dry mouth caused by illness requires medication. Common diseases that cause dry mouth include colds, thirst, etc. Patients can choose targeted medication under the guidance of a professional doctor, such as wind-heat colds, you can choose Yin Qiao tablets and so on. 4. Other causes of dry mouth. Such as taking certain drugs can also appear dry mouth symptoms, this time you can communicate with the doctor can change the drug. If the symptoms of dry mouth occur frequently at night, and accompanied by other symptoms, you need to consult a doctor in a timely manner to clarify the cause of the disease, under the guidance of a professional doctor for treatment, to avoid delayed treatment or blind use of medication to cause adverse effects.