That is a pretty good sign that the temps are wrong in the tank. If the basking area/hot spot doesnt reach aroung 95*-100* in the tank it is probably too cool and he is not digesting his food properly.
It could also be a number of other things too. Impaction, systemic infection, internal problems that are unseen from just looking at him, MBD, parasites, salmonella, bacterial infection, etc. It really depends on the set up and envronmental factors. IE: temp, diet, supplements. etc. If i knew the specs maybe i could help more...
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1.0 ball python- Azazel
1.0 columbian boa- Brooklyn
1.0 JCP-Milton
1.0 borneo blood-Hiss
1.0 peach phase thayeri-Sancho
0.1 creamsicle corn- Pandora
1.1 hognose- Pricilla and Odd
0.1 russian tortoise- Manja
0.1 leo- Boji
0.1 beardie- Indie
1.0 BTS- Griffon
0.1 Iggy- Sunny
0.1 pacific parrolet- Mishka
1.1 cats- Cairo and Oberon
2.4 ratties- Willard, Rizzo, Bree, Blitzkreig, Raisin, and the Runt