"Blood pressure can go up significantly after caffeine use because it seems to block a hormone our bodies produce to keep our arteries open wide. When caffeine makes the blood vessels in our bodies narrower, this leaves less room for blood flow which, in turn, raises blood pressure. The blood vessels supplying blood to the brain can also narrow as much as 27% after caffeine intake which can slow down our ability to think and perform mental tasks."
https://www.vascularhealthclinics.or...scular-system/
Any chance you may be going diabetic or insulin resistant?