What causes drooling during sleep?

Aug 30, 2024 Source: Cainiu Health
Disease description:

My husband drools in his sleep eight out of ten times, and the saliva sometimes has a bad odor. He doesn't know why this happens. I would like to ask what might be causing this.

Doctor's answer (1)
Dr. Liu Chao

Drooling during sleep mainly includes the following points:

1. Improper posture: An incorrect head position during sleep, such as facing downward while sleeping on your side, may increase the likelihood of an open mouth, causing saliva to flow out easily.

2. Neurological disorders: Conditions such as Parkinson's disease and stroke may affect control of the facial muscles, leading to excessive saliva production or difficulty swallowing effectively.

3. Medication side effects: Certain medications, including antidepressants, antipsychotics, and some drugs used to treat hypertension, may increase saliva production as a side effect.

4. Oral problems: Dental misalignment, gingivitis, oral ulcers, and other oral issues may also lead to abnormal saliva secretion.

5. Respiratory issues: Nasal congestion caused by conditions such as sinusitis and allergic rhinitis may force breathing through the mouth, thereby increasing the likelihood of saliva flowing out.

6. Digestive disorders: Digestive conditions such as gastroesophageal reflux disease (GERD) can stimulate the salivary glands to produce more saliva to neutralize stomach acid.

If drooling persists or is accompanied by other uncomfortable symptoms, it is advisable to seek medical attention promptly.