Per another comment here, it's probably autoimmune related. So it's complicated!
Bloodletting? Can’t leak if there’s no blood!
Just raise your blood pressure.... like putting more air in a leaky tire. The farther from zero, the less dead you are. ;-)
It would be interesting to track blood pressure of people post covid for exactly this reason. Autonomic processes will attempt to correct the system when operating outside of norms.
I had COVID and my blood pressure increased significantly. It went back down when I felt better. This is normal for illnesses, I'm told.