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Understanding Allergy Symptoms

Allergies kick in when your immune system overreacts to normally harmless substances called allergens. Your body releases a chemical called histamine, and you start to experience a variety of symptoms.

  1. Itchy, watery eyes

    Many allergens are airborne and come into direct contact with your eyes. That’s why over 80% of people with allergies experience itchy, watery, teary eyes.

  2. Runny nose

    When allergens enter your nose, the membrane swells and presses a fluid out of small blood vessels in your nasal passages – typically a thin, clear liquid.

  3. Sneezing

    Your body’s reaction to histamine includes itchiness and swelling inside your nose and throat. As a result, your brain tells your chest to contract and you start sneezing.

  4. Itchy nose or throat

    Itchy nasal passages are also a reaction to a lot of histamine in your system.

  5. Sinus congestion

    If your allergies include upper respiratory symptoms – sneezing, itchy and runny nose – your sinuses may become swollen and blocked.

Understanding Allergy Symptoms
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ALLERGY ESSENTIALS

Understanding Allergy Symptoms  »
What to Expect at the Allergist »
The Truth About Allergies »
Types of Allergy Medicine »
What is it With Allergies and Sneezing? »
Allergies or Cold? »
How to Prevent Night-time Allergies »

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