If you drool while you sleep, it’s a sign that your

Drooling while you sleep is actually pretty common and usually nothing to worry about. It happens when saliva builds up in the mouth and, instead of being swallowed, leaks out — especially if you’re sleeping on your side or stomach. A few common causes include:

– Mouth breathing (due to allergies, sinus issues, or a cold)

– Sleeping position (side or stomach sleeping lets gravity do its thing)

– Deep sleep stages (muscles relax more, making drooling more likely)

Certain medications or neurological conditions