Drooling during sleep is common and usually occurs because the facial muscles relax, causing the mouth to open slightly and saliva to escape. This is especially common when sleeping on the side or stomach, as gravity causes saliva to flow out of the mouth. Other causes include breathing through the mouth due to nasal congestion or allergies, excess saliva production from conditions like GERD (acid reflux), sleep apnea, certain medications, or neurological issues. Dry mouth can also cause increased saliva production as the body tries to compensate. Most of the time, drooling when sleeping is normal but can sometimes signal underlying health issues if excessive or persistent.
Main Reasons for Drooling While Sleeping
- Relaxed facial muscles and open mouth during sleep
- Sleeping position (side or stomach increases drooling)
- Mouth breathing caused by nasal congestion or allergies
- Excess saliva due to GERD or acid reflux
- Sleep disorders such as sleep apnea
- Certain medications or neurological conditions
- Dry mouth triggering overproduction of saliva
How to Reduce Drooling
- Sleep on your back to keep saliva pooled inside the mouth
- Treat nasal congestion and allergies to reduce mouth breathing
- Manage underlying digestive or sleep disorders with medical help
- Stay hydrated to avoid dry mouth
If drooling is excessive or accompanied by other symptoms, consulting a healthcare provider is advisable.
