High Blood Pressure Support Group
Hypertension or high blood pressure is a medical condition wherein the blood pressure is chronically elevated. Persistent hypertension is one of the risk factors for strokes, heart attacks, heart failure and arterial aneurysm, and is a leading cause of chronic renal failure. Doctors recommend weight loss and regular exercise as the first steps in treating mild to moderate...

But, yes. When something happens all of a sudden, it does cause one to wonder why and if it's a sign of something significant!!
My blood pressure was staying a bit higher than one would like to see, despite 'fiddling' with meds and dosages.
Then, because I take a lot of other medications, I switched from taking my blood pressure med in the evening to taking it in the morning, when I didn't already have so many darn pills to take.
Ever since I did that, my numbers are great!!
(Pretty much the same as yours now are.)
Yeah, I'm with lvnlife6!! Look to see what, if any, changes you have made in your lifestyle, no matter how small or unimportant or unrelated they may seem.
By the way, for what it's worth, my doctor is in agreement with me that it's quite likely that changing when I take my Lisinopril is the reason for my numbers to change.