When we picked up ds from nursery on Wed, we were told his face looked swollen (which indeed it was) and that they had checked the rest of his body and it was fine etc. By the time we got home it was quite bad and obvious he was having a reaction to something so we gave him some piriton and it calmed down. The next night the same thing happened and I have just had a phone call from nursery to say that they had given him piriton just now as his lips were swollen and his throat was irritating him. He has a peanut allergy (not very severe but enough to have an epipen) and they are very careful about this in nursery and don't have nuts on the premises. Does anyone have any idea what could be causing this? He only had rice crispies and raisins to eat this morning so I don't think it is the food.