Skip Navigation

Your Environment. Your Health.



woman giving young girl an asthma treatment

Asthma is an inflammatory disease of the lung. This inflammatory process can occur along the entire airway from the nose to the lung. Once the airway becomes swollen and inflamed it becomes narrower, allowing less air through to the lung tissue and causing symptoms such as wheezing, coughing, chest tightness, and trouble breathing. Once considered a minor ailment affecting only a small portion of the population, asthma is now the most common chronic disorder of childhood, and affects an estimated 6.2 million children under the age of 18. The fact that asthma runs in families suggests that genetic factors play an important role in the development of the disease, however, environmental factors also contribute to the disease process. Asthma can be triggered by a wide range of substances called allergens.

Content courtesy of the Centers for Disease Control and Prevention (CDC)

Health Studies & Clinical Trials 

What NIEHS is Doing on Asthma 

General Information 

Using Inhalers -Video tutorial on model differences and proper usage

For Educators 

Related Topics 

Back to Top

Share This Page:

Page Options:

Request Translation Services