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6. How Do Doctors Diagnose Dermatitis Herpetiformis?

To diagnose DH, you'll likely need a skin biopsy. The doctor takes a small sample of the affected skin and examines it. Sometimes a direct immunofluorescence test is done, in which the doctor stains the skin around the rash with a dye that shows the presence of IgA antibody deposits. Blood tests to check for these antibodies may also inform a diagnosis. Furthermore, an intestinal biopsy can confirm the presence of damage due to celiac disease.

Dermatitis Herpetiformis skin rash

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