Posted in Web Henoch-Schonlein Purpura (HSP): Causes, Symptoms, and … January 27, 2021 Henoch-Schonlein purpura (HSP) is a disease involving inflammation of small blood vessels. It most commonly occurs in children. The inflammation causes blood vessels in the skin, intestines … https://www.webmd.com/skin-problems-and-treatments/henoch-schonlein-purpura-causes-symptoms-treatment