Drooling during sleep is generally a sign of deep relaxation rather than a problem.
As the body enters deeper sleep stages, the muscles that keep the mouth closed and control swallowing begin to relax.
This can cause the mouth to open slightly, while swallowing becomes less frequent.
Saliva continues to be produced, but without regular swallowing, it can build up.
If you sleep on your side or stomach, gravity can make it easier for saliva to escape onto the pillow.
Other factors like nasal congestion from allergies or a cold can lead to mouth breathing, which increases the likelihood of drooling. Conditions like acid reflux may also boost saliva production.
In most cases, it’s harmless, but if drooling suddenly increases or is accompanied by difficulty swallowing or changes in speech, it’s important to seek medical advice.
