My 5 year old son has had no food allergies to date. He had a breakout of hives in the middle of the night. He has had them on and off for a week and has been hive free for 4 days now. He had a mild cold at the time of the break out. The doctor feels it is probably due to the cold but that you can never rule out food allergy. He had a peanut butter cup 5 hours before he broke out in hives. I am so nervous that he has developed the dreaded peanut allergy. He loves nuts, chinese food etc. Etc. The nurse told me to wait for a week and then give him some peanut butter 4 hours apart and see what happens. Has anyone ever heard of an older kid developing anaphylaxis from peanut allergy. I am so scared to test him!!