I.G.
What your daughter is experiencing is also called a vasovagal syncope. I remember my very first day in med school we visited a dialysis unit and 2 students in our group fainted at the sight of blood. It has very little to do with "fear", but is a very deep seated response triggered by the autonomous nervous system.
I have low blood pressure and experience random fainting associated with that. It's not quite the same, but I think there are two ways you can help her:
- start teaching her to recognize situations that might lead to her fainting. As in my example above many people do learn to deal with this and many people may even get used enough to their triggers (sight of blood is a very common one) to become doctors :)
- teach her to protect herself when fainting. As someone else said, I have learned to feel the symptoms come on and react immediately before I fall and possibly hit my head. One thing that helps and sometimes help prevent total loss of consciousness is squatting. It helps in two ways: one is that you are close to the ground and less likely to injure yourself if fainting.
The other is physiological: squatting raises blood pressure by lowering the blood flow to the legs.
If in the future it does interfere with her ability to live a normal life, there are medications that may help (certain antidepressants for example)... but that would not really be a consideration until she is older.
Good luck!