Urticarial vasculitis
Urticarial vasculitis (also known as "chronic urticaria as a manifestation of venulitis", "hypocomplementemic urticarial vasculitis syndrome", "hypocomplementemic vasculitis", and "HUV") is a skin condition characterized by fixed urticarial lesions that appear histologically as a vasculitis. == Mechanism == Antibodies are usually raised against foreign proteins, such as those made by a replicating virus or invading bacterium.