Allergies: Allergy Symptoms, Seasonal Allergies, Allergic Reactions

Allergy Causes and Remedies

An allergic reaction occurs when the immune system overreacts to a foreign protein in the air, in food or on the skin, releasing chemicals called histamines that make you cough, sneeze, get stuffed up, and have itchy eyes or even a skin rash. Luckily, prevention and treatment can make allergies and asthma more of a nuisance than a threat.

Allergy Symptoms

Learn to recognize nasal, food, insect and other allergic reactions.

Get Allergy Relief

Feel like you're breathing through a straw? Try these three allergy and sinus soothers.

How to Survive Allergy Season

Enjoy your favorite time of the year without the sniffles.

Take our allergy quiz

Action Plans

5 Surprising Triggers

AskMD

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nasal allergies

1 in 5
The number of Americans who suffer
from allergies
The Asthma and Allergy Foundation of America

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Allergy Q&As

Kanwaljit K. Brar, MD Pediatrics	Q	Why do people often have both allergies and asthma?
Kanwaljit K. Brar, MD Pediatrics	A	Allergies and asthma are both examples of "atopy", which is a term that means your genes make you more likely to develop allergies. . . Read More