I also have had times of my BP surging. I up meds for awhile, but due to the side effects, I taper off after BP is under control. Example, it's been fine for six months, then it surged. I always feel very unwell when this happens. I upped by meds for two weeks and got it back under control. Unfortunately upping the meds makes my BP go the other way and it gets to low. I have traced this last time to consuming fast food (which I don't normally do) which was high in sodium. I'm now going to monitor this much more closely to see if I can maintain my BP better. It is frustrating. I also am walking very consistently, not overweight, trying to up veggies and fruit, but still it surged.