DS has eczema around his face which gets irritated by acidic things like tomatoes / citrus. I recently gave him some hazelnut butter which made it flare up badly. Is that likely to have been just a contact irritation, or could it suggest he has a mild nut allergy?
I've taken him off both nuts & dairy and his eczema has improved loads, although in the same timescale he's had steroid antibiotics (Fucidin) and I've changed the emollient I used on him so they might be having an effect.