Vaso-Vagal Discussion

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Article 1159

From: Jennifer


I have the same problem, and I was told by a nurse that it's the same effect as standing up too quickly, but on a larger scale.

The sudden decreased amount of blood stimulates a response in the vagus nerve that causes me to black out, get faint and start sweating.

Needles, no problem...blood no problem either. I can give and receive shots and have given stitches several times without so much as a wink.

Heck, I had a baby with no drugs!

I know what you mean about the stares, but it can't be helped. Once I stand up, all bets are off.

It only happens when a good deal of blood is drawn. Three tubes will do it to me too. One or two tubes has no effect, but three tubes or a pint and I'm out like a light.

I also have similar symptoms when I fly-during take off and landing-that I'm guessing have something to do with the change in pressure.

I have a problem with motion sickness too that I'm sure can be related to this in some fashion.


This web site is not a substitute for a thorough medical evaluation and diagnosis of your vaso-vagal type symptoms.  Medical treatment and diagnosis is the only acceptable initial response to these serious symptoms since they might present from any number of life threatening and treatable illnesses. It is for you and your physician to rule out more serious illnesses; Please don't use this online forum as an alternative to getting responsible medical attention and being under the care of a physician for the duration of any unknown, suspected or dangerous vaso-vagal syndrome symptoms.
Last changed: June 22, 2007