Henoch Schonlein Purpura is a type of vasculitis or blood vessel inflamation. This disease affects capillaries (small arterial vessels) in the skin and often the kidneys. Henoch-Schonlein purpura (HSP) causes skin rash (especially behind the lower extremities associated with arthritis and over the buttocks) and cramping pain in the abdominal area. HSP appears more frequently […]