Some thyroid conditions can cause high blood pressure. It's possible your thyroid medication isn't adjusted properly.
Can you, please, give us a little more information, like what thyroid condition do you have? What thyroid medication(s)/dosage(s) are you taking and how long have you been on it?
It would be helpful if you could post your current thyroid hormone levels so we can see where they are. Also be sure to post the reference ranges listed on the lab report, since ranges vary from lab to lab and have to come from your own report for the best comparison. That will help us see what testing/treatment you're receiving and whether your hormone levels are optimal.