How infantile is..?
Answers: Your never to young to get allergies, they are beside you since birth, it just takes a catalyst to trigger them out of a make-shift hibernation. You probably want to find out their allergies snatched as possible so he doesnt go to school soon and eat a peanut butter cracker only to come home swelled up to the max. I recommend a speedy trip to the doctor..
It could be allergies since you and your oldest son had them. No one is too young to hold allergies. I know new born babies that have allergies. The simply way you are going to know for sure is him tested for allergies. you can get allergies at any age, can be born next to allergies, hence nut alleriges etc
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