until my mid 40's my blood pressure was always low to normal. Now it's high enough that I take a blood pressure med. What surprises me is that when I'm feeling the worst, it takes almost nothing to raise it considerably. If I stay flat on my back in bed, it becomes normal. I'm curious if anyone else notices this. The only reason I can think of is that stress tends to raise our blood pressure, and sometimes sitting up too long is a physical stress. I still have OI at my higher bp, but I think it's not as bad. Based on a 5 minute test, I had NMH 25 years ago, and assume I still do.