I accidentally discovered what would stop the itchiness and hives of dermography/urticaria. I was having an itchy episode on my neck and couldn't stop scratching it for days. Of course, the more I scratched the worse it got. I finally went to the doctor and he told me it was poison ivy and I told him I wasn't outdoorsy so I don't know how that could be possible.
He said that it was probably airborne from my neighbor's house. Again, another crazy excuse. One day I was sitting outside in the sun with my dog and I noticed I wasn't as itchy and then thought to myself maybe it's Vitamin D deficiency. Ever since I moved up north, I have always been Vit D deficient. So I starting taking 10,000 IU's a day and after a few days, the itching had subsided and my neck started to clear up. Vitamin D does keep the itchiness and hives under control. However, I can still scratch myself and create all these red, raised lines all over my body if I suddenly have an itch.