I know that dd2 is allergy to cheap tomato soup, some orange juices (normally cheap stuff) and red colourings, she comes up in hives, it used to be contact allergies, and was just a bit red on the skin that had come into contact with the soup etc, but now its coming from inside, hence the hives, but somethings she comes up in hives for no reason that I can see. I want her allery tested but the GP won't do it. 