Skip to content Most people have woken up to a damp pillow at least once. While it may feel embarrassing, occasional drooling during sleep is usually harmless and often happens because the swallowing reflex slows down, muscles relax, or you sleep on your side. As the article explains, “occasional drooling is usually harmless” and is often linked to sleep position, nasal congestion, allergies, or temporary illnesses rather than a serious health problem.
