

So Gaara couldn't sleep, because Shukaku was inside of him, hence his dark
circle eyes. There was that
[guy](https://en.wikipedia.org/wiki/Randy_Gardner_\(record_holder\)) who went
crazy after trying to stay awake for 11 days for his science project. So how
could Gaara function properly, let alone fight?

Evidence from Narutopedia

> During their first conversation when Gaara was a child, Shukaku warned Gaara
> that it would take control of his body and start killing people if he ever
> fell asleep


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naruto
Can Gaara Survive Without Sleep?


I'm actually pretty sure that gaara did sleep sometimes.

It's explained that when the host of shukaku falls asleep, shukaku slowly, key
word slowly, eats away at that individuals personality and psyche. This is
part of the reason that gaara is so unstable, because he DOES sleep sometimes,
and when he does shukaku starts devouring his mind.


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You're trying to justify Naruto's occurrences with human science. Naruto isn't
science fiction, that's the greater point here.

Nevertheless, Gaara's black circles are a major plot hole in Naruto, because
he had them since
[birth](http://img07.deviantart.net/ee2e/i/2013/025/2/e/baby_gaara_by_pablolpark-d5so9es.png),
and I'm pretty sure a premature baby didn't have the rational thinking
required to deprive itself from sleep in other to preserve his identity from
his inner demon. Also, he retain the black circles after losing shukaku, when
he can sleep however much he wants.


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I agree with Anakurak's answer, that Gaara does sleep but with a limited
amount of time and wake up before Shukaku takes full control of his mind and
body.

However, the dark circle is not a result of insomnia, but rather a birthmark
he got since he had was a jinchuuriki even when he was still inside his
mother's womb.

Reference: [Why does Gaara still have dark circles around his
eyes?](https://anime.stackexchange.com/questions/1950/why-does-gaara-still-
have-dark-circles-around-his-eyes/2147)


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