The book "Henoch Schönlein Purpura" offers a comprehensive analysis of this systemic vasculitis, which primarily occurs in young children. It discusses the characteristic features of the disease, including the deposition of immune complexes associated with the antibody IgA in the skin and kidneys. The typical symptoms such as palpable purpura, joint pain, and abdominal pain are described in detail. The book also highlights the self-limiting nature of most cases and the necessity of symptomatic treatment. Additionally, it addresses the possibility of relapses and the risk of irreversible kidney damage. The causes of Henoch Schönlein Purpura are discussed, with references to potential links with viral and bacterial infections as well as adverse drug reactions. This publication is aimed at professionals and interested individuals who wish to gain a deeper understanding of this condition.