2006-12-16 11:52:02 · 7 answers · asked by Yea Yea 4 in Health ➔ Other - Health
It is because of a intense emotional reaction. When the vagus nerve is stimulated, due to fear, anxiety, or physical stimulation, the heart rate is decreased. When the heart rate slows, blood pressure may drop enough to cause fainting. Sometimes the body's process to regulate blood pressure cannot respond quickly enough.
2006-12-16 12:08:02 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Some people get caught up in the thought of the pain they know is involved when blood is drawn or spilled. It tells the brain there is intense pain involved and the brain reacts as if it is experiencing this pain. I knwo the first time I was in the OR watching a surgery while in resp school the sight of the blood combined with the smell of the room caused me to faint. 20 years later I no longer have this reaction. Your brain learns to disassociate the sight with the experience.
2006-12-16 12:05:20 · answer #2 · answered by amy k 2 · 0⤊ 0⤋
When I get my blood drawn, it isn't the sight of the blood that makes me faint - it's the actual feeling itself of the blood being taken from me that causes me to faint.
2006-12-16 11:56:17 · answer #3 · answered by Anonymous · 1⤊ 0⤋
Because they're hemaphobic. My sister is. Actually I'm not sure if it's called hemaphobia but it is some kind of phobia, just like the people who are deathly afraid of spiders or snakes, or airplanes or crowded areas.
2006-12-16 11:55:00 · answer #4 · answered by Anonymous · 1⤊ 0⤋
An intense phobia or FEAR of something causes people to over-react..be it spiders, snakes ...or blood.
2006-12-16 11:56:58 · answer #5 · answered by uncle_derk 3 · 1⤊ 0⤋
it's just like one of the comments that was stated it's a phobia, that i myself even have.
2006-12-16 12:17:36 · answer #6 · answered by chozynson 2 · 0⤊ 0⤋
the same reason why when some people see something really gross they throw up
2006-12-16 12:00:40 · answer #7 · answered by Zoey 4 · 0⤊ 0⤋