Help!!!

[Bogertophis]

That almost looks like an infection or abscess that blew out the top of her nose that has scarred over. I would keep an eye on it as she may have issues shedding right there. Some Neosporin without painkiller or Vetericyn gel on the area right before she pops a shed may keep the scales soft enough so they come off easily when she sheds.

I think you're right about that...that circular area...but at least it doesn't look recent.