Does anyone know what this could be?

[Neal]

@OP - I'm sorry to hear you had to put him down.

They are not burns.

They are not from a heat lamp.

They are not blister disease. Blister disease looks nothing like this and is normally ventral - not dorsal.

Folks, please watch what you post. Looking at a picture of a snake and then inferring husbandry do's and don'ts, throwing out WAGs and jumping to conclusions about how the OP may or may not be caring for his snake are pointless and frankly, insulting.

Good advice is to take the animal to a vet. It would be great if the OP could spring for a necropsy to see if there was a systemic cause or to find a definitive diagnosis.

Yea, this is why I said I had no idea and just took a wild guess from what I think it could of been but I said wild guess so he knew that I wasn't sure. I only asked about the heating just in case somebody else had more insight so that question would be answered already.

How do you know 100% for sure that they were not from either of the 3 things you listed? That seems to be jumping to conclusion as well.

Skip is probably one of the most knowledgeable people on the forum, and I would never question his judgement on this. I've learned this from years of being here.