Yup, I get quite itchy too. A few times I've had soars that have opened and bled or gotten infected because of it. It's the worst on my feet though. I've heard there are some types of amyloidosis that can show up with an itch, I think it was on your upper back, but I'm not sure if that would apply for all over your body. I know it's relatively common, or certainly not uncommon. The itches on my feet just wouldn't go away, as though they were internal.