Senseless at the time of blood test - #22767
This morning I had my blood drawn for a blood test on an empty stomach, and after that, I started feeling dizzy, and my head spun twice. I didn't fall down, but I was spinning intensely. I go running in the field every morning. I am generally afraid of injections and the sight of my own blood. What is the exact reason for my dizziness?"
100% Anonymously
No sign-up needed.

Doctors’ responses
Hello
What you experienced fits very well with a vasovagal reaction.
When you see blood or feel anxiety from injections, your nervous system can suddenly overreact, causing your heart rate and blood pressure to drop.
Because you were fasting, likely dehydrated, and had already run in the morning, your blood sugar and circulating volume were lower than usual, which made the reaction stronger.
This led to dizziness and a spinning sensation without loss of consciousness.
It is common, harmless, and self-limited. Lying down, hydrating, and eating usually stop the symptoms, and
it does not indicate a brain or heart problem.
I trust this helps Thank you
100% Anonymously
Get expert answers anytime, completely confidential. No sign-up needed.
About our doctors
Only qualified doctors who have confirmed the availability of medical education and other certificates of medical practice consult on our service. You can check the qualification confirmation in the doctor's profile.