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Light - Headedness

Light - Headedness

The last three times I have had my blood drawn, I began to feel light-headed, broke out into a sweat and my blood pressure dropped.  After 10 minutes of laying down, I was OK.

This never happened after a blood draw until about 1 1/2 yrs ago.

Any ideas on what could be causing it?
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Dear Bo,

This is vasovaagal syncope or presyncope.  this is very commonly induced with pain or when you're fasting
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