Okay ive been curious for a while. I know the marks on the belly and beard can be because they are stressed but ive also heard they are used to take in more heat. Alex has "stress marks" often but they arent dark. If you look at the most recent picture i posted of him, thats how he almost always looks on his tummy. But other than that he shows no signs of stress. Everything in his cage is correct including temps. I feed him properly. And he is very alert and active. I dont see why he would be stressed. Could this just be the way he is or could there be a hidden problem.