Drooling while you sleep—also called sialorrhea—is far more common (and usually less concerning) than most people realize. While it might feel embarrassing, occasional drooling is often just a harmless side effect of your sleep position, nasal congestion, or even medication. But in some cases, it can signal an underlying issue worth exploring.
Here’s what’s really going on—and when to pay attention.
💤 Common, Harmless Causes
1. Sleep Position
- Side or stomach sleeping causes saliva to pool and leak out of the mouth.
- Solution: Try sleeping on your back with a supportive pillow.
2. Nasal Congestion or Allergies
- When your nose is blocked (from a cold, allergies, or sinus issues), you breathe through your mouth—which relaxes the jaw and allows saliva to escape.
- Solution: Treat congestion with saline spray, antihistamines, or a humidifier.
3. Deep Sleep or REM Sleep
