Hi, I missed your thread earlier but I just posted one on a similar topic: elevated bllod pressure while on LCHF. One thing that is written in the literature is that if you don't get enough salt, potassium and/or magnesium through your diet the diuretic effect of low carb can cause you to expel too much salt via the urine and throw your body out of whack. So you could try supplementing those things. I did, didn't seem to do much for me (yet) but it's only been a few weeks. The good news is, more salt didn't increase it contrary to conventional wisdom, so there's that.

Good luck!