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What causes fainting and how to prevent it during needle procedures

Fainting, or syncope is a temporary loss of consciousness when the brain doesn’t get enough oxygen. Many things, including dehydration, low blood sugar, or anxiety, can cause it. As all doctors know, a common trigger for fainting is seeing blood or a needle. Emotional fainting is very common in humans, especially in younger people, but Read moreā€¦ What causes fainting and how to prevent it during needle procedures originally appeared in KevinMD.com.

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