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Symptoms often include skin lesions (usually on the legs, buttocks or trunk of the body), palpable purpura (bleeding into the skin), multiple papules (small, raised areas on the skin), blisters on the skin, urticaria (hives), itchy skin, burning sensations, enlarged lymph nodes and necrotic ulcers (open sores with dead tissue). Complications may include permanent damage to the blood vessels or skin with scarring. Organ involvement in addition to rash formation is rare, but it can cause severe complications. Kidney inflammation, as well as lung, heart or brain damage has occurred in patients with hypersensitivity vasculitis.
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