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  2. Should you see a doctor for that skin rash? Experts share ...

    www.aol.com/news/see-doctor-skin-rash-experts...

    A hives rash, also called urticaria, typically appears as raised, inflamed, itchy welts on the skin. They can each be separate, appear in clusters or merge into a larger swollen bump.

  3. What are hives? A dermatologist explains

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    Hives, or urticaria, are itchy pink welts that could appear anywhere on your skin. Some are bumps as small as a pinhead, while others may merge together to cover large patches of your skin.

  4. These Pictures Will Help You Identify the Most Common Skin Rashes

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    Other symptoms to note: Hives are most of often the result of exposure to allergens, and they could be a sign of a serious allergic reaction. Hives might not cause any discoloration on darker skin ...

  5. Hives - Wikipedia

    en.wikipedia.org/wiki/Hives

    Hives, also known as urticaria, is a kind of skin rash with red and/or flesh-colored, raised, itchy bumps. [1] Hives may burn or sting. [2] The patches of rash may appear on different body parts, [2] with variable duration from minutes to days, and do not leave any long-lasting skin change. [2]

  6. Dermatographic urticaria - Wikipedia

    en.wikipedia.org/wiki/Dermatographic_urticaria

    Symptoms are thought to be the result of histamine being released by mast cells on the surface of the skin. Despite the lack of antigens, histamine causes the skin to swell in affected areas. If the membrane that surrounds the mast cells is too weak, it will easily and rapidly break down under physical pressure, which then causes an allergic ...

  7. Physical urticaria - Wikipedia

    en.wikipedia.org/wiki/Physical_urticaria

    Physical urticaria is a distinct subgroup of urticaria (hives) that are induced by an exogenous physical stimulus rather than occurring spontaneously. [1] There are seven subcategories that are recognized as independent diseases. [2] [3] Physical urticaria is known to be painful, itchy and physically unappealing; it can recur for months to ...

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