|hi, i've posted in another thread on itching, too. I've had some problems like this, but it's turned out to be food intolerences. I'm not sure yet why these have suddenly come up, but maybe it's thinning of the gut tissue or something.
Anyhow, the welts sound like hives and i've had the itching eyes and pain, too, which all turned out related to the food problems. I've identified several foods that i'm suddenly sensitive to (grains, milk, eggs, coffee), and if I avoid those, then I feel much better. It's worth a try, anyhow.
Btw, try plain tea for the itching eyes. It works for me.