Hypersensitivity vasculitis
Allergic vasculitis is a relatively common disease. Its pathological features include leukocyte nuclear fragmentation vasculitis, skin damage, and multiple internal organ damage. This disease has many names. In order to avoid confusion, Ruiter believes that it is more appropriate to call it allergic vasculitis, which reflects the inflammatory changes in blood vessels caused by allergic reactions. The severity of this disease varies. In mild cases, only skin lesions can heal in a few weeks, while in severe cases, multiple organs may be damaged and even life-threatening.