If your skin suddenly turns red, itchy, or inflamed, you may find yourself wondering whether it’s a simple rash or a case of hives. While both conditions affect the skin and can look alike, they are ...

During seasonal transitions, fluctuations between sudden cold and heat, or dry and damp conditions are common. Rapid climate changes can easily stress the body’s immune system and skin barrier, making ...

Chronic idiopathic urticaria, also known as chronic hives or chronic spontaneous urticaria, is characterized by an itchy skin rash accompanied by raised, tender red welts or spots. It may occur ...

Urticaria multiforme is a skin reaction that causes itchy, ring-shaped welts with bruise-like centers. Although the rash can look alarming, it typically resolves on its own without leaving scars. Also ...

Chronic spontaneous urticaria (CSU) is a type of rash that persists for over 6 weeks without a clear cause. It involves an autoimmune response leading to itching and swelling. Doctors classify ...

Casey Gallagher, MD, is a dermatologist and clinical professor in the Department of Dermatology at the University of Colorado Denver. CSU is a skin condition that causes hives and swelling lasting six ...

Imagine going for a run. The first mile feels great: energy rising, blood pumping. Until a rash creeps up, giving way to itchy, red welts, flushed skin, and hives. For people with such a ...