Scale Rot or Burn?!

[Johan]

Oh, one last thing, my neighbor had fed him about a week ago, and he still hasn't gone to the bathroom. And that's unusual. He usually goes about 5 days after feeding. And it's been 8.

IMO thats the least of your concerns. Your snake has a burn down half its body...it makes sense that his bowl movements may be different. Get him to a vet ASAP