Wake up in the middle of the night, dry mouth, what's going on?

The patient wakes up in the middle of the night with dry mouth and bitter taste, which is considered to be caused by oral ulcer, and the patient may also be accompanied by oral mucosa ulceration and pain; it may also be caused by gingivitis, and gum redness and pain may occur at this time. The patient wakes up in the middle of the night with dry mouth and bitter taste, which is not excluded from digestive dysfunction, and may also be accompanied by abdominal pain and abdominal distension; at the same time, bile reflux caused by gallbladder disease may also occur dry mouth and bitter taste. Patients should actively go to the hospital gastroenterology or stomatology department for treatment, during this period to pay attention to oral hygiene, appropriate increase in drinking water frequency.