Allergy
Allergies occur when the immune system overreacts to substances that are otherwise harmless — from pollen and pet dander to certain foods, medications, and insect stings. This exaggerated immune response triggers the release of chemicals like histamine, causing symptoms that can range from sneezing, itchy eyes, and skin rashes to more serious reactions like anaphylaxis. Allergies are among the most common chronic health conditions in the United States, affecting more than 100 million Americans across all ages, and their prevalence is rising — driven in part by climate change, which is extending pollen seasons and increasing environmental allergen loads. Whether seasonal, perennial, or food-related, allergies can significantly impact quality of life, sleep, productivity, and — in severe cases — can be life-threatening. The good news: with proper diagnosis, personalized treatment, and in many cases allergen immunotherapy, most people with allergies can achieve meaningful relief and live full, unrestricted lives.
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