Patients previously classified as having chronic idiopathic or "ordinary" urticaria are now divided into two groups: 40% to 50% with chronic autoimmune urticaria (CAU) and the remainder with ...

Medically reviewed by Jurairat J. Molina, MD Acute urticaria (hives) is a common skin condition that affects up to 20% of people at some point in their lives. It can transition into chronic urticaria ...

People who have a family history of urticaria are more likely to develop it, as are people with a history of allergies or ...