My son had hives at age 1 on first exposure, we brought him to allergist(he also had asthma and excema) - He sking tested positive for all nuts.
Since then he never had a reaction of any kind. So we brought him in to have another test and he tested negative to all nuts- Yesterday he had the oral challenge. No issues, they first skin test and then fed him some peanuts etc.
Got home at around 1pm, and around 4 he was a little congested and nose was runny(6 hours after last exposure)...We called and the doc said not to worry it most likely wasn't related. Then 3am he woke up coughing and vomited a little. It very possible the vomiting was caused by the coughing. He then said his throat hurt. Its possible he has a cold and the drip caused a sore throat. Or he had a very delayed reaction..
After this I gave him benadryl and he had no hives or itching. We didnt take him in to the ER and maybe we should of, but I had the EPI out and sat over him until morning.
This is over 12 hours after the last exposure.
Wife will call the doctor today, he still says his throat is sore...but basically I dont know what to think..