Eli5: why do we sometimes wake up in a really bad mood after a mid-afternoon nap?

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This is something that happens to me from time to time since I was a kid.

I would take a nap after lunch, on a day like today. Then sometimes wake up feeling disoriented and depressed. Other times I’d feel fine.

What causes this specifically and why does it only happen sometimes?

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34 Answers

Anonymous 0 Comments

Hmm. I thought it was down to me having used up all of the hormone that ‘wakes’ me up, so the out-of-routine nap leaves me groggy.

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