4. Neurological diseases (Parkinson's disease, MS, ALS)
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Reason: These diseases can affect the nerves and muscles responsible for swallowing (dysphagia), which leads to saliva accumulating and leaking during sleep.
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Signs: Tremors, stiffness, balance problems, changes in speech or coordination, progressive weakness.
5. Sleep apnea or obstructive breathing problems
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Why: Mouth breathing during sleep – common in sleep apnea – can lead to increased salivation. This is often a sign of narrowed airways in the nose or throat.
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Signs: Loud snoring, shortness of breath at night, daytime fatigue, morning headaches.
6. Cardiovascular or neurological events (stroke, TIA)
- Reason: A blockage or bleeding in the brain can impair muscle control, including the swallowing and facial muscles. This can lead to excessive drooling on one side during sleep.
- Signs: Sudden drooping of the face, weakness in the arm, slurred speech, confusion, dizziness. This is a medical emergency.
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