Dermatitis herpetiformis is an autoimmune skin condition characterized by pruritic vesicles and papules most commonly on the extensor surfaces of elbows and proximal forearms.
It is strongly associated with coeliac disease.
Diagnosis is by biopsy showing IgA deposits.
Treatment
- Gluten-free diet – but this alone would take around 2 years to decrease the rash
- Dapsone or sulphonamides
Dapsone must be avoided in those with G6PD deficiency as it will cause haemolytic anaemia.
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