<<Disclaimer: Verify this information before applying it to your situation.>> Hal, a dermatologist diagnosed DH just by looking at my gorgeous initial set of lesions 18 years ago, but a (later) skin-plug test was inconclusive. In spite of no positive test, I've assumed he was right about DH. Occasionally my skin would again break out, and it seemed to me that the most likely culprit had been eaten about three days earlier. But this was a bit of a guess since I never intentionally ingested gluten. Btw, I tried using dapsone shortly after being diagnosed. I _hated_ the way it made me feel -- spaced out, freaky, outside of my body, etc -- the way some people apparently take street drugs in order to feel, brother they can keep it. I couldn't stand it. Quit at once. How do y'all who use dapsone react to it, if at all? After that, I controlled outbreaks via a prescription cortisone cream, used very very sparingly. Good luck in your research.