As a juvenile he may be hungry. Some of them can eat every 4-5 days. Another possibility is itchiness. Do you know if he is close to shed? Watch him for a bit if he "yawns" then his is likely trying to loosen the skin. Only question about what you posted earlier:

he has a humid hide and a hide on the hot side.
Are both these hides on the warm end? If so he could be looking for a safe place on the cool side to thermoregulate.

Bloodsong