Vegetable and fruit juices cause a lot of toxins to be released from wherever your body is storing them, but they don't ensure that they will get out of your body. I read this at the site of the lady who wrote Get a Life. She also states that the best way to get the toxins out of your body is by doing coffee enemas. It's not the only way, but it's a good way, and it makes your liver detox, too. As someone already stated, you may get relief if you focus on getting the toxins out. I've also read that hives can be brought on by parasites. Between doing the juicing and enemas, you may start to get anything out that doesn't belong in your body. Chlorella along with niacin that causes a flush are also good at getting things out of your body.