Allergic skin vasculitis

Allergic skin vasculitis is a group of vasculitis diseases characterized by inflammation of small blood vessels, small veins, capillaries and arteries, especially the posterior capillary veins. Muscle-type arteries are not affected, and the clinical manifestations are mainly vascular lesions of the skin. The vascular lesions of the outer skin organs are lighter, involving more joints and kidneys, and most of them do not constitute irreversible organ dysfunction and life danger.