Hehe
You can do a mite test on her. (Gently!) Rub/pet her with a black t-shirt (or let her walk around/cuddle with it for a while on your lap) and then look if there's any flakes. If they're moving they she has mites. If they're not, then she has dry skin (if it's just a couple of flakes, I wouldn't worry about it).
Another to check for mites is to look at one of the quills. If there's a bulb on the end of it, then she's just quilling. If there's no bulb, then it's probably mites.
https://hedgehogcentral.com/mites.shtml
Again, it sounds to me as if it's just her quilling and she's handling it very well-- but it's never a bad idea to safe than sorry =)