Sleep: Saliva production naturally slows during sleep as part of the circadian rhythm. This is why some degree of morning dryness is normal. However, when this combines with any of the above factors, the result is pronounced xerostomia that disrupts sleep quality.
When Dry Mouth Could Signal a Bigger Problem
While occasional mouth dryness is common and manageable, persistent or severe xerostomia can sometimes be the first visible sign of an underlying medical condition. Do not ignore dryness of the tongue and mouth that is chronic, unexplained, or worsening, particularly
Waking up with dry mouth? Here’s what your body might be telling you
