Allergies Health Center
Get News Updates | RSS Help
latest headlines
Carbon Dioxide Gas May Treat Nasal Allergies
A quick blast of carbon dioxide gas into the nose may ease some allergy symptoms better than a placebo, and the relief appears to last for about four hours, a new study shows.
WebMD Allergies Community
Community. Experts. Support.
Community
Top Search Terms for Allergies
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, animal dander, etc.) is called an allergen.
Allergies are a very common problem, affecting at least two out of every 10 Americans.