We were on vacation in Vegas and went to a place where there was a booth that was roasting almonds, cashews and pecans. She has tested positive to almonds and pecans. The place was indoors so probably concentrated. I didn't notice what the booth was at first but when I did we just stayed away from it. But an hour or so after we left the back of her neck started to itch and it wasn't long before she had hives on her waistline and neck. Gave benadryl and it started to go away but came back later, even worse, on her arms and legs and more on her trunk. Went to the ER because all urgent care clinics were closed. They gave her a mix of pepcid, prednisone and benadryl and watched for a while and then let her go with a prescription for all 3. That was Saturday night. She still has hives off and on but from what I understand it's normal for them to take a while to fully resolve. At times she had some redness and a few hives on her face which freaked her out. Never had full-body hives or trouble breathing or any other symptoms but I had the epi at the ready at all times. It probably didn't help that it was extremely hot there which always seems to exacerbate hives anyway. Luckily it was at the tail end of vacation so we were headed home today (Tuesday). But we flew and it caused her to take her meds late (because she has to take them with food and she was not about to eat on the plane) and by the time we landed and got out of the airport she had a few very itchy hives on her waistline, bottom and arms. By the time we got home 2 hours later she was fine and she took a cool bath and shower and seemed fine after that. First reaction other than a hive or two since her first at age 1 and she is 18. I guess we should celebrate that fact but right now we're all just on edge.
I did learn, after this episode, that roasting nuts may release more proteins into the air so in light of that, we're guessing that is the cause. Although you just never know 100% for sure (she had only eaten from ff places that had no nut products at all and we'd never had problems with them before).