No, it's not a rash or the type of mini-welts you get with-poison ivy. This is the kind that is huge, and literally all over, and comes and goes in various places on his body. It tends to stay in creased areas, like the insides of his elbows. He got rid of it with-Benadryl the other night but yesterday it got worse, and this morning he really wanted to go back to bed. (He missed the bus yesterday, too.)