www.fgks.org   »   [go: up one dir, main page]
Skip to content
My WebMD Sign In, Sign Up

Allergies Health Center

Allergies Overview

Allergy symptoms include itchy eyes and skin, sneezing, nasal congestion, wheezing, and rash. Seasonal allergies result from grass, weed, tree pollen, or molds. Cat and dog dander allergies are common. Food allergies include peanut or milk.

Select a Chapter

Seasonal Allergy Symptoms

Nationwide Allergy Map

See how widespread
allergy symptoms are
where you live.

Allergy Basics

What Is an Allergy?

Allergies are an abnormal response of the immune system. People who have allergies have an immune system that reacts to a usually harmless substance in the environment. This substance (pollen, mold, and animal dander, for example) is called an allergen.

Allergies are a very common problem, affecting at least two out of every 10 Americans.

Allergy Basics