answer:Some fluctuation is normal. Especially, if you get dehydrated. Also, it can be different standing and sitting and if you cross your legs. Try to be consistent taking it in the same position, the same time of day. It should hopefully stay in the normal range. Mine is lower in the morning usually than mid day. I don’t know if that’s normal. Mine is high when I need to increase my thyroid meds. I tell doctors and they don’t care, except my endocrinologist, she cares. The only reason I mention it is if you take medications and your blood pressure is high or low, consider the medication might be affecting it. It’s not the medication that really affects mine, but the thyroid hormone level in my body. If yours is high I think take it more than once a day. Just my non-medical opinion. Try to figure out a pattern. A doctor once told me 4 high readings means you probably need it treated. I don’t know if that is some sort of standard? I ignored it and asked for my thyroid to get tested. That’s when I got diagnosed. Is yours suddenly higher?