Dermatitis herpetiformis (DH) is a chronic autoimmune blistering skin condition,[3] characterised by intensely itchy blisters filled with a watery fluid.[4] DH is a cutaneous manifestation of coeliac disease,[5] although the exact causal mechanism is not known. DH is neither related to nor caused by herpes virus; the name means that it is a skin inflammation having an appearance (Latin: -formis) similar to herpes.
The age of onset is usually about 15 to 40, but DH also may affect children and the elderly. Men are slightly more affected than women.[6] Estimates of DH prevalence vary from 1 in 400 to 1 in 10,000. It is most common in patients of northern European and northern Indian ancestry, and is associated with the human leukocyte antigen (HLA) haplotype HLA-DQ2 or HLA-DQ8 along with coeliac disease and gluten sensitivity.[7][8][9][10][11]
^Salmi, T. T.; Hervonen, K.; Kautiainen, H.; Collin, P.; Reunala, T. (August 2011). "Prevalence and incidence of dermatitis herpetiformis: a 40-year prospective study from Finland". The British Journal of Dermatology. 165 (2): 354–359. doi:10.1111/j.1365-2133.2011.10385.x. ISSN1365-2133. PMID21517799. S2CID23165241.
^Spurkland, A.; Ingvarsson, G.; Falk, E. S.; Knutsen, I.; Sollid, L. M.; Thorsby, E. (January 1997). "Dermatitis herpetiformis and celiac disease are both primarily associated with the HLA-DQ (alpha 1*0501, beta 1*02) or the HLA-DQ (alpha 1*03, beta 1*0302) heterodimers". Tissue Antigens. 49 (1): 29–34. doi:10.1111/j.1399-0039.1997.tb02706.x. ISSN0001-2815. PMID9027962.