You probably know urticaria -- one of the most common skin conditions -- by its non-medical name, hives. According to the American College of Allergy, Asthma and Immunology, hives affect about 20% of ...

What are hives and what causes them? Hives are a term used to describe a medical condition known as urticaria, a skin disorder that occurs when the body’s immune system responds to an allergic threat.

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 ...

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When your body has an allergic reaction, it releases chemicals that can make your skin swell, causing those itchy, red bumps on your skin that's characteristic of hives. While certain foods and ...

It's easy to understand how someone who gets hives for the first time could confuse the sudden appearance of raised, red, or skin-colored bumps with bug bites or other skin conditions, such as eczema.

This informational guide, part of PS's Condition Center, lays out the realities of this health concern: what it is, what it can look like, and strategies that medical experts say are proven to help.

They’re red, they’re itchy — and they’re coming for you, just when you need them the least. Hives are a common skin condition, and they typically show up as a red, itchy rash. Known to doctors as ...

Hives are a common symptom of COVID-19 that can occur during the day or night. Hives only at night might be from something you’re coming into contact with in the evenings. COVID-19 can cause hives ...

Norovirus doesn’t usually cause a rash, though some people develop hives. A rash that accompanies stomach symptoms may suggest a different stomach virus or inflammatory bowel disease. Norovirus is a ...

Hives, or urticaria, can occur for many reasons, such as exposure to an allergen or a physical trigger, like pressure from tight clothing. It may also indicate an infection or another underlying ...