What is Henoch-Schönlein purpura (HSP)?
Henoch-Schönlein purpura (say "hen-awk shern-line purr-purr-ah") is a disease that causes the blood vessels in the skin to become inflamed (irritated and swollen). This inflammation is called vasculitis. When the blood vessels in the skin are inflamed, they can bleed, causing a rash that is called purpura. HSP also can affect blood vessels in the bowel and the kidneys. When this happens, the intestines and the kidneys may also bleed.
Written by familydoctor.org editorial staff