I was normal blood work. I had been on steroids for about 5 weeks. That could account for it. I read an article recently about diagnosing PMR without elevated markers. The medical community still thinks even slightly elevated from your baseline may be enough for a diagnosis. I think the problem is most of us do not or did not test for our baseline prior to PMR. But as you say only slightly elevated but still normal range does not mean thats normal for you. I recently had my testosterone checked due to fatigue. Normal was 350 to 850. Well thats a pretty big normal. In this case I had it tested several years ago and know what normal is to me. As for your taper, I think its just your adrenal system trying to awaken. Fortunately you have not been on long. Your system should restart. Google prednisone and adrenal insufficiency. here is one article. https://www.plymouthhospitals.nhs.uk/display-pil/pil-prednisolone-and-adrenal-insufficiency-5729/