I gave blood yesterday and the nurse said I was very borderline on my blood pressure; the second time she measured it it was 100/56. Any ideas as for causes? There's no history of this in my family. Thanks.
I'm asking about HYPOtension, which is low blood pressure, not HYPERtension, which is high blood pressure.
This measurement was taken BEFORE giving blood, so it's not an after effect.
I'm not on any kind of birth control.