So I will often faint when I get a needle, both for vaccinations and blood tests. This is not because I have any apprehension about the needle. If I lie down for the needle rather than sitting it has so far prevented me from fainting.
Several years ago I was describing this to a medically trained friend, and they said that there was a rare physical condition where this happens, but I can't remember what they called it. So is there a distinct term for a physical rather than psychological cause of fainting after being stabbed with a needle?