Do You Wake Up With a Wet Pillow? Find Out Why You Drool While You Sleep

Why do people drool while sleeping?
Drooling during sleep is a common phenomenon that occurs in many people. Although in most cases it is completely normal, in some cases it may be related to certain health problems or sleep habits. Below, we’ll explore the most common causes and when it might be a sign of something more serious.

Common Causes of Nighttime Drooling

Muscle Relaxation

During deep sleep, especially during REM sleep, the body’s muscles relax, including those of the mouth and jaw. This can cause the mouth to open slightly and saliva to flow out instead of being swallowed as it does when we are awake.