By hunched over, it's a slump--definitely hurts him when he stands or sits up straight, but when seated, you probably wouldn't even notice. He didn't even ask to stay home from school and said he felt fine but just that his stomach hurt when he stood up straight. Like I said, I had him jump, and when he said it was fine, I sent him off to school. I told him to go to nurse if it bugs him at all or gets worse. Since nurse hasn't called, I don't know if I'm over-reacting to go get him or whether I should just wait until his appointment. Maybe I should contact his teacher to see how he is doing?