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Whenever we have "goosebumps", there is a momentary piloerection, due to which hair on our elbows and legs get "erected" and "stand" almost perpendicular to the surface of our skin. But why do our "head hair" not get erected ?

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    $\begingroup$ This seems to also be true about facial hair and pubic hair $\endgroup$ – theforestecologist Feb 18 '17 at 15:09
  • $\begingroup$ You can refer to this: quora.com/… Hope this helps! $\endgroup$ – user404365 Feb 19 '17 at 2:43
  • $\begingroup$ Maybe just because these hair are too big to stand on end, so piloerection might occur, but we might not notice it. $\endgroup$ – another 'Homo sapien' Feb 19 '17 at 5:17

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