Strange. Are the scales bend upward making them feel rough? My big blood has some scales that are creased/bent on her where she usually bends when laying around. When you run your hand over it I could see how it would seem rough.
I'm at a loss. I think a pic could really help.
Here are the best pics I could get he would not stay still -.-
His scales don't look that bad today but you can still kind of get the idea:
Not that great, and his scales don't look so dry but...
Until one has loved an animal a part of one's soul remains unawakened.