Spot on head

Hey Everyone,

My Normal has this spot that appeared on his head. I have had him for over a year now and have not changed anything in his care or temperatures.

I believe it's where he's rubbed off some scales but I wanted to make sure.

http://i61.tinypic.com/ju8wwi.jpg

I'd check out the enclosure - it looks like he's been rubbing his head against something.

I can't figure out what it is though. He moves quite a lot for a ball python. The only thing I can think is that he's been trying to get behind the background in his tank. He succeeded once, but that was because it was pushed out.

Got pictures of his setup? Maybe we can help narrow it down for you.

Yep, looks like he has been rubbing.