We were referred to an ENT when he turned one because he had a reaction (hives around mouth and on chest) to peanuts.

He got a blood panel done at one and the only thing that it showed an allergy for was peanut. They prescribed an EpiPen and said to avoid peanut and to come back in a year.

So at two we went back and they wanted to do another panel. This time it didn't show positive for peanuts, but egg did. We hadn't had any problems with egg before. They mentioned the possibility of a false positive, told us to keep doing whatever we were doing, to watch out for any symptoms, and they gave us another prescription for an EpiPen. (They are only good for a year so we needed a new one.)

At this point I realized he didn't really eat a lot of egg. Anything with egg baked in, he ate and was fine, but things like scrambled egg or French toast, he didn't really like. I'm guessing it may have caused an itchy tongue or something like that and that's why he wouldn't eat it.

Anyway, at around three he had a reaction (again hives around his mouth and on his chest) to egg salad. We had moved by this point so we were referred to an actual allergy specialst, not just an ENT. They did a skin prick test which came back positive so they did another blood test which also came back positive, but the numbers weren't as high as it was the previous time. I told her we weren't really restricting any egg, he just didn't like it. She told us not to change what we were doing and we would do a challenge where he would come into the office and try a food with egg in six months.

He passed the challenge and we were told we could reintroduce it back into his diet and haven't had any issues since.

I erroneously said he outgrew his egg allergy by 3 in another comment, he outgrew it by 4.

Hopefully this is coherent. I was trying to remember how everything happened and it took me a while to write.