Vascular, Lymphatic and Systemic Conditions

Henoch-Schonlein purpura. Henoch-Schonlein purpura (HSP) is a disease that involves inflammation which causes blood vessels in the skin, intestines, kidneys, and joints to start leaking. The main symptom is a rash with numerous small bruises, which have a raised appearance, over the legs or buttocks. Other symptoms can include joint and abdominal pain as well as kidney impairment. HSP most commonly occurs in children and in boys more than girls. Adults who develop it generally experience more severe cases.