When we are nervous why do we sweat in our hair?

I used to have a horrible female manager and there was no humanly possible you could be in her office without the woman causing some unpleasantries. She was the most negative woman I have ever know in my life. .



I'd be summoned into her office and even when I thought I had good news for her I could feel sweat comming out of my hair on my head.



I now why hair stands on end but why the sweat in the scalp and hair?

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