When your immune system overreacts to an otherwise harmless substance like food, pet dander, pollen, or dust, this results in an allergy. Allergic responses can include everthing from sneezing, itchy, watery eyes, to life-threatening responses like difficulty breathing, low blood pressure, and anaphylaxis. Find expert information on the symptoms, causes, and medications used to treat allergies.

Explore Allergies

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Signs and Symptoms of Allergies
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Allergies That Might Seem Surprising
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Being Allergic to Garlic Is More Common Than Most People Realize, Study Shows