Drooling while sleeping might seem harmless — and often it is — but if it happens frequently or excessively, it could signal an underlying health condition. 
Here are 6 possible diseases or issues linked to frequent drooling during sleep:
1. Sleep Apnea
-
What it is: A serious sleep disorder where breathing stops and starts repeatedly.
-
Why it causes drooling: People with sleep apnea often sleep with their mouth open, leading to excess saliva loss.
-
Other signs: Loud snoring, choking during sleep, constant fatigue.
2. Neurological Disorders
-
Examples: Parkinson’s disease, ALS (Amyotrophic Lateral Sclerosis), stroke.
-
Why it causes drooling: These conditions can affect muscle control, including the ability to swallow properly.
-
Other signs: Muscle weakness, tremors, difficulty speaking or moving.
3. Sinus or Allergy Issues
-
What happens: Nasal congestion forces mouth breathing at night.
-
Result: Increased drooling due to airflow changes.
-
Other signs: Stuffy nose, sneezing, facial pressure.
