I'm going to share my experiences, even though we haven't officially figured out much. Then I'm going to go back and read all the other wisdom that could help us!
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What foods cause eczema to flair for your DC?
For us, the first one we detected (which later tested positive on an IgG test) was sweet potato. In the beginning, that caused major eczema flare ups. Since then, we strongly suspect egg (I've read it's one of the biggest food triggers of eczema), and possibly potato, EDTA (a preservative in some foods and lots of bath products), and maybe amines (a food chemical).
Environmental triggers are detergents, baths, and cold/dry air (possibly others).
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How soon after ingesting the problem food(or thru mama's milk) did you see a "new" patch of eczema?
I haven't totally figured that out yet. It was about a day for the sweet potato if he ate it. It seemed to be about the next day or so after I ate it too. For egg, it seemed to gradually increase the longer he was eating eggs- there wasn't a huge flare after eating one egg, then skipping them for a bunch of days. It got noticably better within a couple days of stopping eggs.
Also, something we didn't notice until the last month or so (he's had eczema for about a year now) was that it flares up after a bath. I have to assume that it *didn't* flare up before- I'm sure we would have noticed it! Perhaps baths only make it flare up when the eczema is particularly bad? Or, maybe it only affects the eczema on his arms (he just developed eczema on his inner elbows in the last couple months- it was never there before).
A pediatrician I talked to (he studied solely skin diseases in children for a year) said to expect a flare up within 6-10 hours of dc eating the food. He said that a small percentage of kids have foods as a trigger for their eczema. He said that unnatural fibers, environmental irritants, and detergents are more common triggers.
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Part of my problem in identifying the trigger(s) is not knowing how quickly he will have a reaction after the problem food is ingested.
Yep, that makes it really hard! I'm also trying to figure out what 's causing ds to have mushy poop, and that's a lot easier because I can be pretty sure that it was a food he ate in the previous day or two. With eczema, I don't know whether to look earlier that day, or 5 days ago.
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Many people around me blame the eczema on the cold weather, but I'm skeptical and am leaning towards the food-based causes.
Ds's eczema on his cheeks definitely flares in cold/dry air. From what I understand, eczema can be triggered by different things at the same time, so even if you figure out that a few foods trigger it, it could also be triggered by detergents, baths, whatever. I have a question posted asking how to decide if you've hit baseline for food triggers- ie, how do you know that you have all the food triggers out, and you only have environmental triggers left.
eta- oh, I forgot to mention that moisturizing seems to be a BIG factor in how fast a flare up gets better. And not all moisturizers are the same for us- vaseline works fantastic on his cheeks, but not great anywhere else. Eucerin is just ok. CJ's BUTTer is ok. The best we've found, much better than the rest, is Dermamed Baby healing cream. It's expensive, but man does it work!
Edited by DevaMajka - 12/20/10 at 1:42pm