08/05/2026
Drooling (also called hypersalivation or sialorrhea) means saliva flows out of the mouth unintentionally.
Causes of Drooling
1. Sleeping position
Lying on your side or stomach allows saliva to escape from the mouth due to gravity.
2. Deep sleep
During deep sleep, the swallowing reflex slows down, so saliva can accumulate and leak out.
3. Nasal congestion (blocked nose)
Conditions like colds, allergies, or sinus infections force mouth breathing, increasing drooling.
4. Excess saliva production
Caused by infections, acid reflux, pregnancy, or irritation in the mouth.
5. Medications
Some drugs (e.g., sedatives, antipsychotics) increase saliva production or reduce swallowing.
6. Dental or oral problems
Gum disease, tooth misalignment, or mouth ulcers can affect saliva control.
7. Neurological conditions (less common)
Disorders such as Parkinson’s disease, stroke, or nerve damage can impair swallowing and muscle control.
8. Gastroesophageal reflux (GERD)
Acid reflux can stimulate excess saliva as a protective response.
