3 y.o. DS1 has had what the GP said is an allergic reaction rash. It's all over his back, half his stomach, some of his arms and face, especially his cheeks, eyelids & a bit under his eyes. It's not swollen up (though he has had one of those sort of reactions before). Neither is it normal hives, which is the sort of reaction he normally gets. I'm trying to work out what could have caused it.
He'd had the rash for 4-5 days before I gave him AHs and it hasn't gone down very much now after 4 doses of Piriton in the last 1.5 days. Is that normal - or does it suggest that he's still eating/touching whatever it is that's causing it?
His most severe reaction to date (substance unknown, though possibly sesame) disappeared within 24 hours of giving Piriton. Normally hives etc clear up within an hour or two.