Excess saliva at night may be your body’s way of signaling severe acid reflux.
3. Sinus Infections or Allergies
When nasal passages are blocked due to allergies, flu, or sinusitis, you may be forced to breathe through your mouth.
This makes drooling much more likely.
If your drooling is accompanied by:
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Stuffy nose
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Facial pressure
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Postnasal drip
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Chronic coughing
then sinus problems may be the reason.
4. Neurological Disorders
The brain plays a major role in controlling swallowing and facial muscles.
Diseases that affect these functions can lead to drooling, even in adults.
These include:
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Parkinson’s disease
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Stroke
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Multiple sclerosis
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Amyotrophic lateral sclerosis (ALS)
If drooling appears suddenly along with weakness, slurred speech, or loss of coordination, urgent medical attention is required.
5. Tonsillitis or Enlarged Tonsils
Infections of the tonsils can cause swelling, pain, and difficulty swallowing.