My blood pressure has always been low but last few months it's been high. I have symptoms of orthostatic intolerance. I get dizzy and fidgety standing and feel better with hydration and electrolytes and tightening blood vessels. Is it possible to have high BP and OI? What can I do if I need to avoid salt and decongestants which help me because they constrict my vessels. Maybe the higher BP will result in less dizziness but it's certainly bad for the heart.