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Welcome, eCureMe.com medical contents search January 8, 2014
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Urticaria

more about Urticaria


Hives



Abnormal
  • This is a reaction in the skin involving small, red swellings called wheals.
  • Hives occur when the body's immune system reacts to an outside stimulus, such as an allergen, in an inappropriate manner, releasing IgE antibodies that trigger a "complement cascade" of histamine. The histamine results in the red lesions of Hives that we see.

  • Red circular Hives/wheals -- red, raised welts. Sometimes the welts will "melt into each other," giving the appearance of areas with large raised red swelling
  • Itching is usually severe, but occasionally absent.
  • Swelling of tongue, lips, eyelids, palms, soles, and genitals in more severe attacks. Breathing problems may also occur.

  • Allergies:
    1. Food, e.g., shellfish, nut, strawberries
    2. Environmental, e.g., feathers, animal hairs, and cosmetics
    3. Medications, e.g., penicillin, aspirin
  • Medications -- nonallergic form, e.g., Atropine, Pilocarpine, Morphine
  • Insect/bug bites and stings
  • Heat
  • Cold
  • Skin pressure
  • Infections such as Hepatitis B

  • Epinephrine 1:1000 injection for severe reactions (especially if associated breathing problems or more severe reactions such as swollen lips and tongue occur)
  • Antihistamines, e.g., Hydroxyzine, Zyrtec
  • Oral Prednisone is sometimes helpful.
  • Doxepin (an older antidepressant) helps in chronic cases

  • Seek immediate medical attention. This condition can be life threatening if it is not treated immediately.





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