Thanks a lot for all the concerns.
Yes, he does "hold it." He never goes in his cage. I don't know if that could be the reason, but it is worth checking.
Something else that I didn't include that may help is that he S thunder or other loud noises (firecrackers). He used to break out when he heard those, but now he breaks out no matter what, he's been doing this for the last 3 weeks.