Tomatoes

[scpips]

Is it possible for a child to be allergic to just some types of concentrate?
This summer my 6 year old son has had two instances - one after a pizza and another after ketchup - where almost immediately afterwards the skin around his lips went very red and is extremely itchy. Both times his lips have become slightly swollen.
He was tested for allergies last year and everything was fine. He has also eaten tomato concentrate in other foods this summer, and had no reaction. But on these two occasions it did seem he was having some kind of reaction. Is this possible?

It might not be the tomato. It might be another ingredient in the sauce.

DD1 sometimes got red around the mouth after tomatoes, mostly at one cafe. I had thought different varieties of tomato but I suppose it could have been cross-contamination 🧐

Agree it may not be the tomato. What other ingredients were the common factor in those two cases?

It hadn't occurred to me at all that it could be something else, since the tomato seemed the most obvious shared ingredient.
That is so helpful, thank you.

Look at the top UK 14 allergens list (they will be the ones in bold on ingredients). Anything on them that might be in the sauce, celery is in ketchup for example.

It's very common (even among the otherwise non-allergic) to come up in blotches on skin contact with certain tomato products, usually at the cheaper end of the market (own brand ketchup is a prime example) because of the acidity in the tomatoes and the vinegar used. Most children who get this grow out of it by 7 or so.

There is such a thing as nightshade intolerance. I've had a few clients who are massively allergic to tomatoes, peppers and other members of the nightshade family. All of my clients have been adults, but after they have cut out nightshades, they have found their symptoms went away.

my 5 year old is allergic to tomatoes. Apparently a true tomato allergy (like my sons) is rare, but my dad is allergic to citric acid, so it could be the acidity in the product youre giving him thats causing the reaction as my dad would sometimes have a reaction to tomato products.

My son on the other hand can't even have anything with tomato powder or flavouring or colouring etc. Hes also coeliac, so you can imagine how fun meal times in my house are!

This is all so helpful, thank you everyone, and has given me much to think about.
I will go through the ingredients in both products and see what is shared between them (apart from tomatoes).

Also as a mother of a child who has multiple food/environment allergies, your dc could be allergic to something unexpected. I thought
we knew all my ds's allergies were, until the dr did the blood test for 120+ allergens from single test.
Also there is sensitivity, my ds isn't allergic to many fruit, but he can get mimicing effect if he eats the skin.(dr explained the substance under the fruit skin mimics certain allergen) So we peal everything, otherwise he feel too itchy and uncomfortable to eat any fruit.

Tomatoes can make your body produce histamine giving a non-immune pseudo allergy reactions mimicking what happens when your body encounters an allergen. Sometimes also called histamine release reaction