I've posted here a couple of times and lurked lots and right now I'm feeling really overwhelmed and need a bit of a crash course, if anyone is up for it! My ds reacts to dairy and to eggs, as far as I know. Dairy was pretty obvious, and pretty much all through my breastmilk - he tried it twice directly before we gave it up completely. He had most of the classics: "collicky", gassy, stuffed up, excema, not sleeping (well, he still doesn't really...), he even stopped gaining weight for a bit, etc., as well as a red "welty" rash on his face after each time he had something directly. With eggs, he'd had yolks directly about 3 times ever - no whites - and threw up each time within an hour or so. Otherwise, though, no real issues with small exposures to egg-containing foods (mayo, etc...) or through my milk. Got rid of all exposures for him after the 3rd try with the yolk, though I haven't eliminated it for me and am still bf.
So we got allergy testing done (RAST) and everything came back negative. Surprising to us, but not shocking...he's only two (just under when he was tested) and I know they are not 100% reliable, esp in young kids. Doc doesn't want to do a scratch test - we don't want to put him through it at this point, either. We've been referred to a pediatric allergy clinic and are waiting for an appt.
I don't understand, though, the ins and outs of testing and diagnosis, and of allergy vs. sensitivity. I've also read reference to IgA vs. IgE allergies - I can't find much out there on this, could someone help me out? As far as I understand, is the RAST testing just for IgE reactions? Afaik
, there is not testing for sensitivities, right? So if it's "just" a sensitivity, does that mean there's no risk for it becoming anaphylactic? I'm so confused and over my head here - I don't trust the ped or really the other docs, so far I seem to know more than they do, and I'm at the end of what I "know" at the moment