Six Facts About Asthma

March 15, 2019

Increased sensitivity to normally harmless substances, such as pet dander or air pollution, may be a trigger for allergic asthma. Someone with asthma that comes across these triggers may experience chronic airway inflammation, congestion, and wheezing, making it difficult to breathe. 

Learn more about allergic asthma

While symptoms come and go, airway inflammation can be chronic, meaning it never goes away, and may be associated with persistent narrowing of the airways, even when the person feels well. For most people with asthma, that inflammation is triggered or maintained by exposure to allergens to which they are sensitized.1 This means asthma and allergies often go hand in hand.

In the United States, more than 25 million people are affected by asthma according to the most recent data released by the Centers for Disease Control and Prevention (CDC).2

Facts about asthma infographic | Allergy Insider
  1. Yawn, BP et al. Recommendations to Improve Asthma Outcomes: Work Group Call to Action. Sept. 2018. 
  2. Centers for Disease Control and Prevention [Internet]. Most Recent National Asthma Data [updated 2023 May 10; cited 2023 Aug 21]. Available from: https://www.cdc.gov/asthma/most_recent_national_asthma_data.htm.
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