Pink scales, red edges, raised scales, especially on the belly. Usually happens when the cage is really soggy or really dirty for an extended period of time, so just watch your snakes and keep 'em clean. They'll probably be fine - even if they are starting to get scale rot, a clean cage and a good shed usually takes care of it no problem.
If your girl is hanging out on the cold side and eating and otherwise acting normally, I wouldn't worry about it. Some snakes just like it cooler! She may also prefer the hiding place on the cool side, so that's worth checking as well. Try just swapping the sides that the hides are on.
-Jen