There are several conditions that can cause a dry throat after waking up: first of all, it is more common that the dryness of the pharynx and even the mucous membrane of the nasal cavity is caused by the seasonal exchange, or the dryness of the indoor air. In this case, you should keep the indoor air moist, you can use a humidifier or put some water in the house to make the air moist, and this symptom will be relieved. Secondly, when there is pharyngeal inflammation, it may also cause dryness and pain in the throat and other uncomfortable feelings after waking up. Then, when the nasal cavity is not ventilated, most of the patients need to open their mouth to breathe, and the air will directly stimulate the throat, causing dryness and pain in the throat. Finally, patients who are obese or have a narrow pharyngeal cavity snore more seriously during sleep, and the mucous membrane of the pharyngeal cavity vibrates or is stimulated by air, causing a dry feeling in the throat.