Eczema sounds like an inflammtory response provoked by a reaction from mast cells.
I won't even touch wheat starch myself. Wheat starch, I noticed, makes chips taste better, when I was eatting them a long time ago.
The purification of starch over the protein is not a perfect one, so I would say she is lucky. So she may be able to handle a minute amount, just like I can. If it says the package just touched wheat, I usually won't bother me.
You said you were indian, right? Allergy to corn might be a corrective thing in a way, because of your ancestors eatting too much corn, and having 2.2 times the suicide rate of americans who are already depressed. I am not trying to say anything bad about you, or them. Sometimes people don't have much of a choice. Ignorance can make some tasks harder to. There is a virus with similar proteins to wheat gluten to, might be something like that.