Very interesting, @Idnam.  When I was experiencing this problem at its worse, I found high carb meals like lots of rice or too many cookies were a trigger.

Really interesting, Kitty, thank you. 

Thankyou I will definitely have a look your very  insightful and a lot is making sence 👍

Oh my, I have always had the symptoms for B12 deficiency, which is why I had the blood test that led to my celiac disease diagnosis I had been taking  B vits have been always been amazed that all ,my bloods were perfectly normal! I queried this many times with my doctor as to whether the B12 was active and being absorbed or whether it was just in my bloodstream. They dismissed this idea. And of course I still take them. Thank you so much, what a revelation and really quite understandable,  I am about due for my annual full blood test so maybe I will just stop taking them?

@SB04, Have you been checked for B12 deficiency?  A deficiency in Vitamin B12 will cause hives and also raise the tTg 3 IgG level, even in people without Celiac Disease.   You can have B12 deficiency without having Celiac Disease.   All eight B vitamins work together.  Do not supplement just a single B vitamin.   Best wishes.