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| What Are Hives? What Is Urticaria? What Causes Hives? |
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| Medical News - Dermatology | |||
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Hives are also known as urticaria, welts, wheals, or nettle rash. It is a red, raised, itchy skin rash that is sometimes triggered by something that produces an allergic reaction - an allergen. When there is an allergic reaction the body releases a protein called histamine. When histamine is released our capillaries (tiny blood vessels) leak fluid. The fluid accumulates in the skin and causes a rash. Read more: Dermatology News From Medical News Today
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