A couple of years ago, I developed the most awful case of poison ivy and I tried everything, but it kept spreading.
So, I got this idea of soaking in a tub of Epsom Salts and baking soda. I knew that Epsom Salts would draw toxins out of your body and the baking soda would absorb them, so I decided it had to work on posion ivy, too. So, I tried a bath. Almost immediately, the poison ivy began drying up. I also made an Epsom Salt paste (added a little water to epsom salt) and rubbed it on the really bad places. It was kinda messy when it dried, but it did help.
Within a couple of days, the poison ivy was almost gone.