Hypereosinophilic dermatitis (HED) is a mild manifestation or benign end of hypereosinophilic syndrome (HES), and some scholars believe that it is a subtype of HES. Some of its causes and related mechanisms have been clarified, and systemic application of glucocorticoids is the first choice for the treatment of HED. Regarding its classification criteria, it is necessary to refer to HES, the paper reviews the etiology and pathogenesis, classification and treatment of HED.
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