vasovagal syncope
This Is Why Some People Faint When They See Blood
Vasovagal syncope is basically a misguided effort by the vagus nerve: In trying to make you chill out, it overshoots and instead makes you pass out.
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Vasovagal syncope is basically a misguided effort by the vagus nerve: In trying to make you chill out, it overshoots and instead makes you pass out.