I have a 45 yr. old girlfriend who just became developed an allergic reaction to eggs the last couple of weeks.
My mom had a severe allergic reaction to eggs when we were kids, she was probably mid-30's.
People can develop egg allergies at any age.
So, good sleuth work mom :) From the sounds of it, he is definitely allergic. Does he have any other symptoms, besides the immediate upheaval? Any breathing difficulties? Red, itchy eyes?
Did you have all the allergy testing done on him with the peanut allergy? If not, you should make that appointment ASAP. Insist on getting it done so you know what all your dealing with.
Good luck! And sorry about all the dietary restrictions you'll be forever faced with...You can google egg free recipes. There is a great site with egg substitution ideas.