Random red & white blotches?

I was told he is a Garden Phase Amazon Tree Boa. He eats no problem. Sheds perfectly in one piece (woohoo!). He actually just shed the other day....
Well, my question is what are the red & white blotches on him? They're on the front half of his body and are on both sides. They've been there the entire time I've had him. The scales there look normal (not deformed or burned or anything). Does he just have random cool markings? Or should I be worried?

P.S. I know his cage looks dry, but it's not. And he's normally not on the ground (like he is in this picture)...but I probably made him mad :rolleyes:

http://i113.photobucket.com/albums/n...P4131240ab.jpg