When I was pregnant with my son, I acquired a rash that left my shocked OB scratching her head. It stuck around for far longer than I would have wished. But once it went away, it never came back...I think. I also would get hives, but I'm not sure that was related.
It was AMAZING in its itchiness, redness, rawness, and the shear surface area of my body that it covered.
During my pregnancy, I also had a "sun burn" on my face. Now, this was not a true sunburn. It just came up, stuck around a few days, and left, even though I hadn't been in the sun.
I get urticaria, easily, but I doubt this would have anything to do with DH. It could just be a little overactivity in my immune system, but the hives usually go away rather quickly.
I have not been diagnosed, yet, but have had a favorable response to the gluten-free diet.
I was wondering if anyone else has heard of this, or read of it. Since I was pregnant, I've had minor rashes, but I've not been able to connect them to food yet. I will keep investigating. I have noticed that I itch a lot, if I've had gluten. I also noticed that a fat bruise on my knee got SUPER itchy after a glutening. This seemed to be beyond the "healing itch."