Sleeping Drool Could Reveal Hidden Health Issues You Might Be Missing

Why Do People Drool in Their Sleep?

Drooling happens when saliva escapes the mouth during sleep. This is especially common when someone sleeps on their side or stomach, allowing saliva to pool and leak out more easily.

During deep sleep, facial muscles relax, making drooling more likely. For many people, it’s simply a natural part of sleeping.

However, when drooling becomes excessive or suddenly increases, it may signal something more significant.