Pustular psoriasis is a rare subtype of psoriasis characterized by the presence of aseptic pustules and neutrophils infiltration in skin lesion. It can be further classified into three groups: acrodermatitis continua of Hallopeau (ACH), palmoplantar pustular psoriasis (PPPP), and generalized pustular psoriasis (GPP). GPP is a disseminated, severe and poten-
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