N.H.
Maybe he needs a small snack. I know since I can remember if I stay up too late, ususually past midnight now, I HAVE to eat something or I'll get sick to my stomach. It's weird how I only get that feeling at night. When I was a teenager was when I first noticed it and I'd get to where I couldn't fall asleep until I had a snack.....even if I had eaten dinner that night.......and still to this day it's the same but now I'm just aware as to why I get that feeling and know how to fix it. Usually I'll make some english muffins, toast, sandwich, popcorn, crackers, yogurt, pudding, jello, apple, cantaloupe, banana, cup of OJ, etc. Something not to fullfilling on the stomach but enough to get rid of that nautious feeling. So next time he gets a nautious feeling, even if he doesn't think he "can" eat, get him to eat a little something and see if that helps! Good luck to you and your son.......HTH!