In the unlikely case that your symptoms are like mine, as described in the previous section, don't assume that corn is the reason. I've corresponded with three people with similar symptoms. One is sensitive to onions and one to milk. For the last, corn was only one of several food allergies.
The way that I eliminated corn from my diet, also described in the previous section, is backwards. You'll get a much clearer answer if you eliminate all corn products at once instead of tapering off as I did. If you don't see any change in a couple of weeks, go back to eating corn. If again you don't see any change, corn is almost certainly not your problem. Eat it and enjoy it.
If you do see a definite change for the better while you're not eating corn, you'll need to settle in for the long haul. That's the topic of the next section, Changing the way you shop, cook, and eat.