Acid reflux, also called gastroesophageal reflux disease or GERD, can contribute to nighttime throat and mouth discomfort. When stomach acid moves upward into the throat, it may cause irritation, a bitter or sour taste, coughing, throat clearing, or a dry feeling.
Reflux can be worse at night because lying down makes it easier for stomach contents to move upward. The source article explains that GERD may irritate tissues, cause a dry or bitter taste, and disrupt normal saliva balance.
If dry mouth comes with heartburn, sour taste, throat burning, coughing at night, or hoarseness in the morning, reflux may be part of the problem.
5. Sleep Disorders, Including Sleep Apnea
