ds has reacted to something, we think it is hypoallergenic bath soap - my dd got him in the bath and applied the soap - I turned up a couple of minutes later and his arms are red and warm with definite edges to the red. I've given him about a third of a teaspoon of piriton and he is in bed. sounds like he's asleep. Dd used to have a milk allergy and would vomit so I would have been more hesitant to put her to bed, I'm presuming he wont vomit with a skin allergy and that he is now ok. Have I under-reacted?