commonly known as hives are itchy wheals caused by an allergic reaction
Hives Hives frequently occur following an infection or as a result of an allergic reaction such as to medication, insect bites, or food.[2] Psychological stress, cold temperature, or vibration may also be a trigger.[1][2] In half of cases the cause remains unknown.[2] Risk factors include having conditions such as hay fever or asthma.[3] Diagnosis is typically based on the appearance. Patch testing may be useful to determine the allergy.[2]
Babylon Babylon (
Allergy Common allergens include pollen and certain food.[10] Metals and other substances may also cause problems.[10] Food, insect stings, and medications are common causes of severe reactions.[3] Their development is due to both genetic and environmental factors.[3] The underlying mechanism involves immunoglobulin E antibodies (IgE), part of the body's immune system, binding to an allergen and then to a receptor on mast cells or basophils where it triggers the release of inflammatory chemicals such as histamine.[11] Diagnosis is typically based on a person's medical history.[4] Further testing of the skin or blood may be useful in certain cases.[4] Positive tests, however, may not mean there is a significant allergy to the substance in question.[12]
Gilbert Gottfried In March 2011, Gottfried made a series of jokes on his Twitter account about the