Weird sore appeared on cornsnake's head

[AlicePastel]

Preface: I don't feed her live mice, so no injury possibility of that. This mark hasn't affected her appetite. There's nothing innately sharp or hard in her enclosure.

The mark is perfectly centered..

Edit: If the pic upload didn't work, here is a link below.

https://gyazo.com/64a3785e0305005ba180c389a304e35f

Wondering if anyone has encountered this mark before, pretty concerned..

[lady_bug87]

Welcome to the forum! It looks like a rub spot. Has anything changed in the enclosure? Sometimes rubs are just from exploring and sometimes they're stress related. Keep an eye on the area and watch for spreading. It should heal on its own.