This is intriguing. I have been on a gluten free diet for years due to probable celiac. My diagnosis was based on having NO IgA, but also having other celiac symptoms. Since my daughter has celiac, I went gluten free before my doctor got around to doing other testing (putting a scope down my throat) so no confirmation there.
For a year now I have a rash that does look like DH. Doctors say it is probably something that I am ingesting but can’t give a definitive cause. The rash is also not in the areas that my research says are typical for DH. My rash started on my wrist, then arms, thighs, back and chest and I have had rosacea off and on for years so I can’t say if it is on my face or not. I am strictly gluten free.
I will add DH to my list of things for my doctors to investigate. Could just be coincidence?