I am talking about systolic of 190 dropping to 150 in 40 minutes.
My diastolic changed from 90 to 80 during the same time frame...
using different arms, and waiting for the blood vessels to recover.

I've been telling my doctor about this for years and she never believed me. I don't show signs of HBP in the eyes or elsewhere.
I take my pressures at home. Sometimes my diastolic goes down to 70 ! But my systolic is averaging 140-150 on good days.

I've been tested for pheochromocytoma, and I don't have that. I am just highly reactive..emotionally. I take my meds well, and am very compliant. I've been hypertensive since a severe systemic staph infection from a black fly bite in Maine 30 yrs ago. I was very ill with that, and barely missed a brain abscess. (I was on vacation there). I recovered, but was left with hypertension afterwards. The doctors there told me if I hadn't driven to the nearest hospital when I did, I would have died 12 hrs later. The black fly crawled under my sunglasses and bit me on the eyelid. I had a 103 fever the next day!