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  2. What are hives? A dermatologist explains

    www.aol.com/news/hives-dermatologist-explains...

    Anyone can get hives. According to the American Osteopathic College of Dermatology , 10-20% of people will get hives at least once in their lives. Individual hives usually go away in less than 24 ...

  3. Cholinergic urticaria - Wikipedia

    en.wikipedia.org/wiki/Cholinergic_urticaria

    Cholinergic urticaria may significantly impair quality of life, especially in relation to normal day to day activities. It is caused by an overreaction of the immune system to the release of histamine, mast cells, and other chemicals in response to the small nerve fibers throughout the body due to the increase in body temperature being allergic ...

  4. Hives - Wikipedia

    en.wikipedia.org/wiki/Hives

    Hives, or urticaria, is a form of skin rash with red, raised, itchy bumps. [1] They may also burn or sting. [2] Hives can appear anywhere on the surface of the skin. Whether the trigger is allergic or not, a complex release of inflammatory mediators, including histamine from cutaneous mast cells, results in fluid leakage from superficial blood ...

  5. Dermatographic urticaria - Wikipedia

    en.wikipedia.org/wiki/Dermatographic_urticaria

    As it is often the result of scratches, involving contact with other materials, it can be confused with an allergic reaction, when in fact it is the act of being scratched that causes a wheal to appear. These wheals are a subset of urticaria (hives), and appear within minutes, in some cases accompanied by itching. The first outbreak of ...

  6. 16 Ways to Get Rid of Hives, According to Doctors - AOL

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  7. Cold urticaria - Wikipedia

    en.wikipedia.org/wiki/Cold_urticaria

    Swimming: Swimming can be especially dangerous, as the rapid heart rate combined with the onset of hives can lead to hypotension, shock, and drowning. Sweat: A reaction may even occur on a warm day or coming out of a sauna when there is sweat on the skin, since the reaction is triggered by skin temperature, not core temperature. If there is a ...

  8. Aquagenic urticaria - Wikipedia

    en.wikipedia.org/wiki/Aquagenic_urticaria

    The hives associated with aquagenic urticaria are typically small (approximately 1–3 mm), red- or skin-colored welts (called wheals) with clearly defined edges. It most commonly develops on the neck, upper trunk and arms, although it can occur anywhere on the body. Once the water source is removed, the rash generally fades within 30 to 60 ...

  9. Allergy - Wikipedia

    en.wikipedia.org/wiki/Allergy

    An allergy blood test is quick and simple and can be ordered by a licensed health care provider (e.g., an allergy specialist) or general practitioner. Unlike skin-prick testing, a blood test can be performed irrespective of age, skin condition, medication, symptom, disease activity, and pregnancy.

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