Hi, newbie here.
When I was on Pred the first time (15 years old), my hair grew like CRAZY. It's already thick and it got like, crazy thicker. Anyway, they tapered me off of it really fast, and my hair came out in wads. My stylist said I lost about 40%. The second time I went on Pred, I experienced hair loss, but not as much because hey tapered me off more slowly.
So I think it's more because of the meds than the disease. It's been five years and those are the only two instances I have had with hair loss.