I may be wrong but I have always thought that the brain doesnt have any nerve endings, so why is it we get headaches and where does this pain come from?

I have heard lack of sleep, hydration or stress can causes headaches but I am interested in why and where the pain comes from this.

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    $\begingroup$ I knew it would be somewhere, I just couldnt find it .. Thanks $\endgroup$ – Mr.Burns May 26 '17 at 15:05

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