Drooling in your sleep is usually a sign that your body is deeply relaxed, not broken. When you finally drift off and transition into the deeper stages of sleep, particularly during Rapid Eye Movement (REM) sleep, your body undergoes a natural process of temporary muscle paralysis known as atonia. This process ensures that you do not physically act out your vivid dreams, but it also means that the muscles responsible for keeping your jaw firmly closed completely loosen their grip. Simultaneously, the automatic swallowing reflex that functions seamlessly while you are awake slows down significantly. Because your mouth may fall slightly open during this profound state of rest, and because your salivary glands continue to produce moisture throughout the night, the excess fluid naturally accumulates. If you happen to sleep on your side or your stomach, gravity simply takes over, helping that pooling saliva spill out cleanly onto your pillow.
If you drool while you sleep, it’s a sign that your brain… See More onMay 18, 2026
