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Henoch-Schonlein purpura

  • Definition

    Henoch-Schonlein purpura is a disease that involves purple spots on the skin, joint pain, gastrointestinal problems, and glomerulonephritis (a type of kidney disorder).


    Alternative Names

    Anaphylactoid purpura; Vascular purpura


    Causes, incidence, and risk factors

    Henoch-Schonlein is caused by an abnormal response of the immune system. It is unclear why this occurs.

    The syndrome is usually seen in children, but it may affect people of any age. It is more common in boys than in girls. Many people with Henoch-Schonlein purpura had an upper respiratory illness in the weeks before.