What are environmental allergies?
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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.
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... More
