# Human Drool

**URL:** <https://boards.straightdope.com/t/human-drool/167949>\
**Category:** Factual Questions\
**Created:** [April 11, 2003, 2:57am UTC](https://boards.straightdope.com/t/human-drool/167949 "2003-04-11T02:57:20Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Mapwife](https://avatars.discourse-cdn.com/v4/letter/m/90db22/32.png) [@Mapwife](https://boards.straightdope.com/u/Mapwife)\
**Post date:** [April 11, 2003, 2:57am UTC](https://boards.straightdope.com/t/human-drool/167949/1 "2003-04-11T02:57:20Z")

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Do all humans drool when they sleep?

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**Author:** ![modro](https://avatars.discourse-cdn.com/v4/letter/m/6de8d8/32.png) [@modro](https://boards.straightdope.com/u/modro)\
**Post date:** [April 11, 2003, 3:03am UTC](https://boards.straightdope.com/t/human-drool/167949/2 "2003-04-11T03:03:11Z")

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I would have to say it probably varies from person to person.

I assume that I personally don’t, if I do, it is very infrequently, simply because my pillow never has any marks on it to suggest I do.

Plus I never wake up with my face on a wet spot.

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**Author:** ![Stan\_Doubt](https://avatars.discourse-cdn.com/v4/letter/s/53a042/32.png) [@Stan\_Doubt](https://boards.straightdope.com/u/Stan_Doubt)\
**Post date:** [April 11, 2003, 3:11am UTC](https://boards.straightdope.com/t/human-drool/167949/3 "2003-04-11T03:11:24Z")

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In my experience, people are much more prone to drooling while napping during the day than at night. Furthermore, I would guess that salivary glands are responsible-most people don’t turn in right after dinner and I’d guess that the glands are less active at night.

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**Author:** ![sivispacem](https://avatars.discourse-cdn.com/v4/letter/s/b19c9b/32.png) [@sivispacem](https://boards.straightdope.com/u/sivispacem)\
**Post date:** [April 11, 2003, 3:16am UTC](https://boards.straightdope.com/t/human-drool/167949/4 "2003-04-11T03:16:30Z")

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I’ve noticed I usually drool more when my nose is stuffy. I’d assume all humans drool (produce saliva) when they sleep, but whether or not it ends up on their pillow, sheets, hair, SO - depends on the angle of their head and whether or not they sleep with their mouths open.