Hi Sharon,
Yes it can!! I have HBP anyway, but I am able to keep it at or below 140/90. However, I once had my BP steadily rise a few points a day over a 2 week period while awaiting a stressful event. It peaked at 180/111 the night of the event, and dropped over the next few days back to normal. I have also monitored it before something stressful, and after. At each occasion my BP went way up. Alot of it seems to be how we each respond to stress. I shudder to think what it has been over the years when I wasn't monitoring it...or while sitting in traffic....LOL!
Regards, Brenden.