funny lol same thing happened to me yesterday. i see my pastel is getting ready to shed and set him aside in my shed tub where humidity is a little higher and his belly before the shed and his shed after were both a reddish tint. and ive had him for over a year and never noticed.
What are you using for substrate? I use newspaper... 1. It's free! 2. Works just as well as anything else out there. 3. Easy to clean, just swap the old newspaper when your snake makes a mess with a whole new set of newspaper.
~ DZ
Well I've had him for a couple months and I've never actually replaced his bedding. I layed newspaper all over the bottom, then covered it with about 3/4 of an inch of aspen snake bedding.
UPDATE:: His skin has faded from a red to a more of a pinkish color. I think you are all right about him going into shed because bits of dead skin are now starting to peel off. Here are some pics:
You can see the redness better on his lower half on this picture.
This happened to my female pastel. I thought thought there was something wrong, so I waited till she shed to see what was going on. After she shed, she looked just fine. In fact the "scabbing" look a lot worse on my female, than it does in your pics. So my advice would be to just wait until she sheds out.