I lost over 50% of my hair coinciding with having PMR . My rheumatologist challenged my assertion that this was a side effect of Prednisone - and a few friends also said don't blame the Prednisone - but the accompanying stress you are going through after PMR Dx. My hair grew back , but I had to cut it short to sort of start over because the new growth was sticking up all over the place. I can scrunch my hair now and make it curly, not a bad outcome !