Does anyone know what this could be?

[Neal]

[IMG][/IMG]
I went to clean out my ball pythons tank today and found this on my male, I was just wondering if anyone has ever seen this before and where he could have gotten it from.

Well a number of things. How are you heating the cage and do you have a thermostat? I'm just taking a wild guess here because my other guess would be like cancer or some wild guess, but then it wouldn't be red like that.