To me it looks like a burn --- but I am no health expert--- can he get anywhere near his basking lamp- do you have a heat rock in tank or something hot ? Others will haft to weigh in on this and if it is a burn that would be why his beard is black - hes in pain
Karrie
I dont have a heating rock but they way his habitat is set up he probably burnt it on the heating lamp it is a bit close to his walls, I have some mesh stuff on them so he can climb, so I'll move it away so he doesn't do it again! Thank you