- Reason: Weakness or paralysis of one side of the face can impair the ability to close the lips and swallow saliva effectively.
- Signs: Drooping of one side of the face, difficulty closing one eye, asymmetrical smile, slurred speech.
3. Gastroesophageal reflux disease (GERD)
- Reason: When stomach acid rises into the esophagus, this can trigger a reflex increase in saliva production as the body tries to neutralize the acid.
- Symptoms: Heartburn, sour taste in the mouth, nighttime cough, chest discomfort.
4. Neurological diseases (Parkinson's disease, MS, ALS)
- Reason: These diseases can affect the nerves and muscles responsible for swallowing (dysphagia), which leads to saliva accumulating and leaking during sleep.
- Signs: Tremors, stiffness, balance problems, changes in speech or coordination, progressive weakness.
