→ Drooping of one side of the face
→ Difficulty closing one eye
→ Loss of forehead wrinkles on one side
→ Altered taste
Action: Seek medical care immediately—early treatment improves recovery.
3. Gastroesophageal Reflux Disease (GERD)
What it is: Stomach acid flows back into the esophagus
Why it causes drooling: Acid irritation triggers excess saliva production (a protective reflex called "water brash")
Other symptoms:
→ Heartburn, especially after meals or when lying down
→ Sour taste in mouth upon waking
→ Chronic cough or hoarseness
→ Chest discomfort
Action: Consult a gastroenterologist; lifestyle changes + medication often help.
4. Neurological Conditions (Parkinson's Disease, Stroke)
What it is: Disorders affecting brain control of muscles and reflexes
Why it causes drooling: Impaired swallowing reflex (dysphagia) + reduced facial muscle control
Other symptoms:
→ Tremors, stiffness, slow movement (Parkinson's)
→ Sudden weakness, slurred speech, confusion (stroke)
→ Difficulty managing saliva even while awake
Action: Stroke symptoms require emergency care. For progressive symptoms, see a neurologist.
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