Hi SparkePanda, Yes, my Michael whom is also lactose intolorant (mild and mostly grown out of), has had on and off stomach pain since he could talk as well. I have talked about it extensively with his doctor whom is not concerend. Over the years, I have chalked it up to his rather "type A", personality that goes along with his sensory issues. I think some of these kids are walking around a little more "tightly wound" then the most of us. If they are not yet comfortable in their bodies or surroundings, I have to believe that this is also internalized phyically. Think about it....when you are upset, worried, how does your stomach feel? I usually lose my appetite, or get a stomachache myself. So eating for a sensory kid might easily set off stomach pains. I don't push Michael to eat big meals...quite frankly, he can't eat big meals...stomach aches....MY advice, talk to your doc just to make sure their is not any otherthing going on, (im sure you already have), otherwise, try not to worry about it too much. As he becomes more sensory regulated, chances are his stomach pains will lesson. qannie47