Poison ivy stinks! Have you had him take those baths...Aveeno, maybe? (Maybe not; that name just popped into my head.) It's kind of like oatmeal, and it soothes the skin to keep from itching. My son did that (we called it "kid soup") and it helped a lot. Also that really pricey cream from the pharmacy that starts with a Z...I know, I'm a ton of help; sorry! That's what I get for working all weekend. And wash his sheets, clean the sofa, etc., anything that he touched while he had the oil on his skin -- it can still be there and re-infect him. (Or you!)