Excessive salivation during sleep, known as nocturnal hypersalivation , is a common phenomenon. While often benign, it can sometimes be a symptom of an underlying disorder. Here’s a professional analysis of the main causes and their medical significance.
1️⃣Sleeping position (on your side or on your stomach)
Sleeping on your side or stomach encourages the natural flow of saliva from your mouth due to gravity. This is the most common cause and is generally harmless.
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2️⃣Oral breathing
When the nose is congested (cold, allergies, sinusitis), we breathe through the mouth. This can cause:
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A prolonged opening of the lips
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A buildup of saliva
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A discharge during sleep
👉If it is frequent, it could indicate a chronic ENT problem .
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