He is on aspen shavings...most of my snakes are in a rack with a thrmostat...but he has been in a glass aquarium for the past couple months with a small Zoo-Med UTH without a thrmostat. Are you thinking a burn?
I will try posting some closer picture. Uploading pictures to this site only works 50% of the time for me and I don't know why. They are all the exact same format but half of the time after I upload it will say "format not supported," or something to that nature. I will give it a shot later.