Allergy symptoms

What Are Allergies?

Allergies are common conditions that 20% to 25% of Americans experience everyday.  They are an adverse response that the body has to a foreign substance like dust or certain food such as nuts.  These substances are generally safe and are called allergen when cause an allergic reaction.


Allergy occurs when immune system responds to an allergen as an invader, just like an infection.  When the allergen enters the body, immune system generates type of antibody called IgE that attaches to allergen to fight it off.  The body produces and releases various chemicals such as histamine into our blood stream causing allergic reactions.  Now the next time our body is exposed to the same allergen, our immune system develops more of the same antibody and same chemicals released into our system so we experience the same allergic reaction.  The type of the symptoms is determined by the way you got the allergen.  For instance, you can have difficulties with breathing and airways if you inhale dust. Read more »

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