“Do you wake up with a wet pillow? Find out why you drool in your sleep” | April 17, 2025

Why do people drool while sleeping?
Drooling while sleeping is a common occurrence that affects many people. While in most cases it is completely normal, in some situations it can be related to certain health problems or sleeping habits. Below, we’ll look at the most common causes and when it could be a sign of something more serious.

Common Causes of Nighttime Drooling
Muscle Relaxation
During deep sleep, especially REM sleep, muscles throughout the body, including the mouth and jaw muscles, relax. This can cause the mouth to open slightly and saliva to flow out, instead of being swallowed as happens when we are awake.

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