Psoriasis is characterized by red, scaly and well-demarked skin lesions that arise through chronic interactions between hyper-proliferative keratinocytes and activated residential immune cells.
Sjúkdómurinn einkennist af rauðum, vel afmörkuðum skellum í húð sem myndast vegna samspils offjölgunar og ófullkominnar sérhæfingar hyrnisfrumna og krónísks bólgusvars hvítfrumna í húð.