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What are environmental allergies?

Some of the common environmental allergens are tree, grass weed pollens, mold spores, pet dander and dust mites. Environmental changes and cold, dry or windy weather conditions can trigger the release of these spores and pollen from their sources.

Environmental allergies happen when your body's immune system overreacts to a substance in the environment, such as dust mites, pollen, pet dander or mold. Antibodies in your immune system identify the substance as dangerous even though it's often not. To try to protect itself, your body produces chemicals that can cause symptoms of allergies.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.