By DH I presume you mean dermatitis. I do not have that as such but I do have an itchy skin. I have always put it down to chlorine as I like to swim so it is tricky to ascertain. I notice that you say your symptoms are not that severe. Mine can be but they are spasmodic, so I am suspecting an intolerance more than celiac disease. I have gone gluten free since Friday and have seen an improvement. After a month, if all is well, I will start to add gluten as you suggest. If I become ill again, I shall do as Barb suggests and insist on an endoscopy. She has been very helpful too. I have had an endoscopy before and dread it. I am a woos.