I have a male with that same scar. He was like my 2nd ball python. At the time I kept them in tanks. I used cage carpet and he had got under the carpet and I guess from rubbing under the carpet. He got a raw spot on the top of his head just like that. Caught it in time and switched back to aspen. But it was bad enough to leave him with a scar. Hes my poss DBL Het VPI snow. So when I seen it I freaked out a bit.