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
Gravity opens the mouth slightly → saliva leaks out
Most common cause — especially if only one side of the pillow is wet
✅ Fix: Try sleeping on your back with a supportive pillow to keep airways open and jaw closed.
2. Nasal Congestion or Breathing Issues
Allergies, colds, deviated septum, or sleep apnea force mouth breathing
Dry mouth leads to increased salivation as a protective response
🩺 If you snore or wake up gasping, talk to a doctor about possible obstructive sleep apnea (OSA).
3. Acid Reflux (GERD)
Stomach acid rising at night irritates the esophagus
Triggers excess saliva production (“water brash”) to neutralize acid
📌 Often comes with heartburn, bitter taste, or chronic cough.
4. Medications & Supplements
Some drugs increase saliva production or relax facial muscles:
Antipsychotics
Certain antidepressants
Seizure medications
Cholinesterase inhibitors (used in dementia)
💊 Always consult your doctor before changing meds.
5. Dental Issues
Ill-fitting retainers, braces, or dentures
Gum disease or tooth infections
TMJ disorder (jaw misalignment)
🦷 See a dentist if drooling started after dental work.
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