In the first photo, I do see what looks like blisters ond the edge of the belly scales, which could indicate a thermal burn, but, it doesn't look as red as most of the burns that I've seen, which also leads me to think that it could be skin irritation from being on the cedar. Either way, the best that I can suggest is to keep it on dry paper towels, Betadine soaks, and keep a close eye on it for any changes that would warrant an immediate vet trip...