Patients with dry throat while sleeping mainly consider the following three causes: The first case, mainly seen in patients who are obese or have rhinitis, because the nose is often not ventilated or the mucous membrane of the pharyngeal cavity is particularly flaccid. Therefore, the patient often breathes with an open mouth when sleeping, and the patient often has a dry throat. In severe cases, the patient often gets up at night to drink water, which affects normal rest, as well as work and rest. In the second case, it is mainly related to the living environment. Maybe the humidity of the air inside the home is not enough, so the patient will have a dry throat when sleeping. In the third case, the mucous membrane of the throat is inflammatory, so the secretion function of the mucous membrane of the pharyngeal cavity is reduced, so the patient will have a dry throat when he sleeps. Regardless of which of the above causes are actively treated, the patient’s dry throat in bed should improve significantly after symptomatic treatment.