: Diagnosis is usually confirmed through a punch biopsy of uninvolved skin near the rash to look for IgA antibody deposits (the "gold standard" test).

: While oral medications like dapsone can stop the itch within 48–72 hours, a lifelong, strict gluten-free diet (GFD) is the only permanent solution to keep symptoms in remission.

: Because the blisters are often scratched off before they are seen by a doctor, patients are frequently told they have atopic dermatitis, scabies, or even fungal infections for years before getting a correct biopsy.