Gorgeous fire. Sometimes my guys/gals will get a few scales or patches like that. i agree with Robin, it seems like the pink belly would be my first concern. The wrinkly scales will probably go away on their own. Has he been sitting on damp substrate? My male will poop INSIDE his little two part hide and then stew in his own poop occasionally. It's super gross, but if i don't lift off the top and look inside the bottom half, I might not notice it, thinking that one of the other must have pooped... They can do some weird things that you wouldn't expect! But if it is on his back and not his belly, I would expect the problem is coming from above, rather than below. What's the setup like?