Why do we get allergies?

Answer: Immune system overreacts

Allergens are actually poisonous — Wrong. Allergens (pollen, dust mites, peanuts, etc.) are harmless to most people. Allergies occur when the immune system mistakenly identifies harmless substances as dangerous threats and launches an aggressive defense (releasing histamine, causing inflammation). The allergen itself isn't poisonous—the problem is the immune system's misguided overreaction to something that shouldn't trigger a response.

Immune system overreacts ✓ — Correct! Allergies are immune system errors. Your immune system incorrectly identifies harmless substances (pollen, peanuts, pet dander) as dangerous invaders. It produces IgE antibodies and releases histamine, causing inflammation, sneezing, itching, or severe reactions (anaphylaxis). The allergen isn't actually harmful—the immune overreaction causes symptoms. Why some develop allergies isn't fully understood—genetics and environmental factors play roles.

Allergens damage cells directly — Wrong. Allergens don't directly damage cells—they're harmless to non-allergic people. In allergic individuals, the immune system mistakenly treats allergens as dangerous, producing IgE antibodies and releasing histamine. These immune chemicals (not the allergen itself) cause symptoms: inflammation, itching, mucus production, and in severe cases, anaphylactic shock. The damage comes from the body's overreaction, not the allergen.