Posted on April 14, 2009 in Latest News
Hives are raised itchy welts which appear on the skin. They occur in small clusters and may cover a large area of the body. Though hives may be caused due to various factors, allergy is the most common reason behind a hives outbreak. All allergies such as food, pollen, animal dander, dust mites, insect allergies etc. can cause hives.
Why Do Allergies Cause Hives?
Allergies are caused when the immune system mistakenly identifies harmless proteins or allergens as dangerous and reacts against it. To understand why allergies cause hives, it is important to know the allergy mechanism.
When the immune system identifies an allergen, it releases antibodies called IgE antibodies against the specific allergen. These antibodies bind to special cells known as the mast cells (These cells are present in the body tissue). The next time the immune system encounters the allergen, the IgE antibodies bind themselves to the allergen and the mast cells release chemicals such as histamine to fight the allergen. When histamine is released by the mast cells, a hives outbreak is triggered along with other allergic symptoms.
Allergy testing, which involves tests such as skin prick test, blood test etc. can help you to determine if your hives are caused due to allergies.
Treating Hives:
Hives which are caused due to allergies are treated by antihistamines such as Benadryl, Corticosteroids, or Epinephrine. Over-the-counter anti-histamines can be used to treat hives. Cool compresses and wearing loose clothing help in hives treatment.
Hives can be acute or chronic (lasting more than 6 weeks). If your hives are severe, it is recommended to consult your doctor.
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