Hives are itchy red or white bumps that often stem from an allergic reaction. Unlike some other rashes, hives are not contagious and are an allergic-type reaction. Hives and other rashes can become ...

Autoimmune hives (urticaria) are a type of rash caused by an overactive immune system that attacks healthy skin. It may be associated with an autoimmune condition, such as autoimmune thyroid disease.

If your skin is breaking out in hives, it may be a sign of an underlying health condition like lupus or infection. It could also be an allergic reaction. Speaking to an allergist can help with ...