You wake up.

The room is quiet.

And there it is — a damp spot on your pillow.

For many, this is just a quirky part of sleep — like snoring or talking in your dreams.

But if it happens night after night, in large amounts, or started suddenly?

It might be more than just a messy pillow.

Persistent drooling during sleep — known medically as sialorrhea — isn’t always a cause for concern.

But when it’s frequent, excessive, or new, it can be a silent signal from your body that something needs a closer look.

Let’s explore 6 possible causes of nighttime drooling — from harmless habits to health conditions that benefit from early awareness.

🌟 Is Drooling Normal?