Ds2 has had a reaction come up all around his mouth just now. It is red and blotchy. He is 1 year old and the only two things that I think can have caused it were peanut butter or strawberries that he had as part of his tea. He has had peanut butter before when he has shared a little of his older brother's sandwhich. But this time he had a slice all to himself. He has also had strawberries before as we made smoothies the other day and he had a little then. But tonight he had his own portion of the smoothies. He has excema, but otherwise has not shown a reaction to any food before.
Any ideas what I should do?