is skin sensitivity to a food indicative of an intolerance to that food?

[onthefly]

possibly, but it'd be hard to tell precisely what they were reacting too.

[Nai]

Yes - they often suggest testing allergenic foods on the lips before getting the child to eat them. Also the allergy tests are all done with skin pr!ck tests where they scratch the skin, add the allergen and see if there is a reaction. It may be difficult to know though what the allergen was though unless you separate out the ingredients.

[Pholi]

I would say no - I have no food allergies or intolerances, but my skin will get rashy on contact with tomatoes, citrus juice or oils, cooking/massage/essential oils, the sap from fruit or plants like figs...

Nai is right about testing allergens first with touching them to the lips, but a rash isn't conclusive, whereas swellling or systemic reaction is. Lip skin functions very differently from the rest of our skin. It's like a cross between skin and mucous membrane like we have inside the mouth.

If you wanted to test it, I'd put a glob of wet vitabrit on his forearm for a bit and see if the rash comes up there. Then you could go on the work out if it's the milk, or the wheat, or the preservatives in it, etc...