Drooling While Sleeping: Fact vs. Viral Fiction
The Truth About Sleeping Drool
Drooling while you sleep is almost always a normal, harmless bodily function. It is rarely—if ever—a sign of a medical crisis. Here is why it happens:
- Muscle Relaxation: During deep REM (Rapid Eye Movement) sleep, your body enters a state of profound relaxation, including the muscles in your jaw and mouth. As your muscles relax, your mouth may fall slightly open, allowing saliva to escape rather than being swallowed.
- Gravity and Positioning: If you sleep on your side or stomach, gravity naturally encourages saliva to pool in the corner of your mouth and leak out. This is a simple physical reaction to your posture.
- Nasal Congestion: When you have a cold, allergies, or a sinus issue, your nasal passages can become blocked, forcing you to breathe through your mouth. This often leads to increased saliva production and, consequently, more drooling.
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