vasovagal reflex

11.25.09

Why Does Blood Make Some People Squeamish But Not Others?

Faint at the sight of blood? Blame it on evolution
By Melinda Wenner Posted 02.27.2008 at 3:39 pm 2 Comments

Looking at blood can be hard on anyone, but for some people, it can be a huge problem. Up to 30 percent of children are afraid of the sight of blood, a response that usually continues into adulthood, according to the definitive study on the topic, by Isaac Marks of the Institute of Psychiatry in London.

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