Pink belly. Scale rot or burn?

[Natt]

I've had my ball python for almost a month and she shed the day before I got her. I changed all the bedding in the tank when I got her too. She came with an under tank heating pad that didn't work very well, she was always cold, I've experimented with different heating bulbs and currently got rid of them because it was drying her tank out too much.

I got a new under tank heating pad about 2 weeks ago which works very well and keeps her tank humid. I have a thermometer that measures the humidity between 70 & 90 and the temperature at 70 although I assume its warmer in her hide than what it is above the mulch.

I've kept the mulch wet cause the previous owner and other people experienced with snakes have told me to, however now I don't know if its causing scale rot.

I noticed yesterday her under belly was pinkish red from the tip of her tail to about half way up her 4ft body. There's no red spots but her scales there almost look wrinkly like when you soak your hands for too long but not quite that extreme, you have to look really close to see it and her scales arn't seperating at all.

If it is a burn is there anything I can do to treat it? I originally thought it was and I removed one of her hides and left the one that sits on the cool side of the tank but if it's a burn how long will it take to notice the pink colour fading? If it's not a burn, am I risking her health if I wait long enough to find out for sure or should I treat her with betidine solution and ointment sooner rather than later?

Either way I'm putting dry mulch in her tank today just incase.

Any feedback is greatly appreciated, thanks.