Hives and angioedema Symptoms

Signs and symptoms
... Acute hives can last from less than a day to up to six weeks, whereas chronic hives last more than six weeks — sometimes occurring for months to years at a time. Often, angioedema and hives occu...

Causes
... The lesions of hives and angioedema are caused by inflammation in the skin. In some cases, hives and angioedema are triggered when certain cells (mast cells) — which line the blood vessels in yo...

Hives and angioedema Other

Overview
... Hives — also known as urticaria — are raised, red, often itchy welts (wheals) of various sizes that appear and disappear on the skin. Angioedema, a similar swelling, causes large welts dee...