He had what seemed like poison oak all over his hands, itchy and awful. When my daughter was experimenting to find out why she was having so much abdominal pain and diarrhea after eating certain meals, we ran across a suggestion that this type of rash could be gluten related.
It wasn't classic, it was just on his hands. But after a 3-month gluten-free trial, his hands were clear for the first time in 15 years (not to mention that he had no more migraines or abdominal pain). He has been gluten free since. Well, until a couple of weeks ago when he decided to eat some gluten containing food that his wife could no longer eat, he didn't want it to go to waste. He was so sick, and realizes he must stay gluten free. Makes us certain the rash WAS DH, even without official diagnosis, not dishydrotic eczema which has also been suggested.