Heat rash or nut allergy - very confused!!

[PeachShark]

Introduced peanuts for second time on Friday with morning porridge to DS (nearly 11mo). All seemed fine, until I noticed what looked like mild heat rash just on upper arms that evening when getting ready for bath.

Could this have been a late reaction to the nuts? Or is it more likely due to it just being hotter the last few days? Not sure if we need to pause the next introduction and get an allergy test to be on the safe side or if I’m being paranoid. Annoyingly I didn’t take a photo of the rash as I put it down to the hot weather at the time but upon reflection I’m worrying it was linked to the peanut butter he had that morning. Not sure what to do!

I think it's most probably due to the heat. However, I'm no Doctor, so my advice would be to get medical advice before re introducing anything nut related, just to be on the safe side.

Are allergies in your family. Any allergies
Not just nuts?

There is a high genetic link

I'd also consult a doc

A rash is not to be ignored

My dd is nut allergic but
She gets a
Sore mouth not a rash so we found out when she was old
Enough to tell us.

Be aware that allergies tend to step up in severity with every exposure so just take care with giving peanuts again. Make sure you have antihistamine syrup in the house.

I'm experienced with allergies as I have an anaphylactic nut allergy. When DD came out in blotches after eating dairy I did give it to her one more time to be absolutely sure. It didn't feel too risky as there's quite a way to go between a rash and a life threatening reaction but you do need to be ready for action just in case they do react badly. I would treat a rash with antihistamine just in case there are less obvious symptoms you can't see. One problem with young children is that they might not tell you they have an itchy mouth for example.

Very helpful thanks all. My brother has a nut allergy and eczema and all my immediate family including myself have asthma (mild) so there is a family history there too.

I actually didn’t know about antihistamine syrup! I’ll get some to have in the house.

I think I’ll call gp tomorrow to be on the safe side. I’m worried that if we delay introducing nuts he’ll be more likely to develop an allergy so we will probably go to an allergy specialist privately to speed things up if the gp thinks it warrants investigation

Why not go for an allergy test and even after that, keep the meds handy. Then bit by bit even if not identified as allergic

I don’t think so with such a delayed rash. It’s likely heat.

Da has severe Peanut allergy. He was admitted to hospital recently to test for the other 3 nuts he also used to be mildly allergic to. They say that if not reaction after 3 hrs they have passed the challenge. Ie not allergic.

It’s only if they have reaction within 3 hrs that they could continue with worse or different reactions up to 24hrs later.
Ds passed Hazelnut, cashew and almond over three days, always being given at 9am in increase doses over 3hrs. If he could eat 5 whole nuts at 11/11.30am, then by 12/1pm he was cleared as no longer allergic. With Peanut on day 4, he had tiny amount of peanut dust at 9am, more peanut crumbs 9.20am, few more 9.40am, about 1/6th peanut at 10am then at 10.15am projectile vomited everywhere, heart rate increased, red checks and peanut challenge cancelled with him being rated as 3 out of 4 anaphylactic allergic. Then we have to stay another 24hrs after incase.

That’s really interesting thank you. Spoke to HV today and they said it’s safe to try again before speaking to gp but I might call the gp to be on the safe side as there’s a family history also.

Sensible to do so and see gp I think.

@PeachShark ours did a full blood allergy test after first reaction on peanuts. It then showed up other things he was also allergic to.