What are allergies? Allergies are hypersensitivities, overreactions of the immune system to substances that do not cause reactions in most people. The substances that trigger the overreaction are called allergens. Signs and Symptoms Allergic reactions can be variable in severity, with symptoms ranging from mild and short-lived to serious and life-threatening. Any severe, acute allergic reaction has the potential to be life-threatening, causing anaphylaxis, a multi-organ reaction that can start with • Agitation • A feeling of impending doom • Pale skin due to low blood pressure • Loss of consciousness (fainting) : Examples of other signs and symptoms of anaphylaxis include: • Red rash, hives • Swollen throat, trouble swallowing • Wheezing, trouble breathing, tightness in the chest • Vomiting, diarrhea, cramping Sample Required? A blood sample drawn from a vein in your arm . Test Preparation Needed? None
Posted on: Tue, 25 Nov 2014 11:38:21 +0000
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