You wake up groggy.
Reach up to wipe your face…
And notice your pillow is damp — again.
Nighttime drooling — medically known as sialorrhea during sleep — is more common than you think.
And while it might feel embarrassing, it’s usually harmless.
Yes, your sleep position is the #1 culprit.
But could your mind play a role too?
Let’s explore what science says about why pillows get wet at night — so you can respond wisely, not worry endlessly.
Because real wellness isn’t about perfection.
It’s about understanding your body — even in its quietest habits.
🔍 Why Do We Drool During Sleep?
Saliva helps with digestion, oral hygiene, and swallowing — but when we’re awake, we swallow reflexively, keeping things dry.
At night?
👉 That reflex slows down — especially in deep sleep.
If you’re lying on your side or stomach, gravity pulls saliva toward the pillow instead of the throat.
💡 Occasional drooling = normal.
Frequent soaking = worth investigating.
✅ Common Physical Causes of a Wet Pillow
1. Sleeping on Your Side or Stomach