If he has nasty BMs and vomiting I would suspect celiac disease...........I
was diagnosed with it when I was 11yr, at that time I weighed 44pounds,
wearing size 6x clothing. My arms and legs were matchstick thin and my
stomach was huge bloatsd...............yes I just looked like those starving
kids in Ethiopia. Celiac is a gluten intolerance, so it is managed by diet.
Hope this info helps.
Teresa