Need help with my ball python!

[PitOnTheProwl]

While it could be burns, I would think a normal heat pad going through a tank and felt wouldn't give burns, would it? Should I change to a thicker substrate? Maybe go with a couple inches of bark?

Your snake already answered that question for you there I think.
Heat source needs to be regulated and husbandry should be corrected for both animals.

http://www.pitontheprowl.com/husbandry.html
Or
http://ball-pythons.net/forums/showt...ius)-Caresheet