Tuesday, June 29, 2010

what is ALLERGY??


WHAT IS ALLERGY??
Allergy is an overreaction of the body's natural immune system towards substances that are otherwise harmless.

The human body has its own independent defence mechanism- the immune system- to protect itself against potentially harmful substances. A healthy immune system only reacts when it identifies harmful or foreign substances, such as bacteria or other microbes. Sometimes, the immune system mistakenly identifies substances that are usually harmless, such as pollen, dust, mould or certain foods, to be harmful and then triggers a series of reactions, leading to various systoms of allergy.

WHAT CAUSES AN ALLERGY??
While many allergic triggers come from the environment, the likelihood of allergic response is often genetically determined. Family history is the most important factor, children from allergic particularly if the parents and siblings have experienced some forms of allergy, such as food allergy, asthma, atopic eczema and hay fever.

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