Asthma Risk Factors
The most common risk factors for developing asthma is having a parent with asthma, having a severe respiratory infection as a child, having an allergic condition, or being exposed to certain chemical irritants or industrial dusts in the workplace.
What puts people at risk for developing asthma?
- Family history
If you have a parent with asthma, you are three to six times more likely to develop asthma than someone who does not have a parent with asthma.
- Viral respiratory infections
Respiratory problems during infancy and childhood can cause wheezing. Some children who experience viral respiratory infections go on to develop chronic asthma.
Having an allergic condition, such as atopic dermatitis (eczema) or allergic rhinitis (hay fever), is a risk factor for developing asthma.
- Occupational exposures
If you have asthma, exposures to certain elements in the workplace can cause asthma symptoms. And, for some people, exposure to certain dusts (industrial or wood dusts), chemical fumes and vapors, and molds can cause asthma to develop for the very first time.
Cigarette smoke irritates the airways. Smokers have a high risk of asthma. Those whose mothers smoked during pregnancy or who were exposed to secondhand smoke are also more likely to have asthma. Learn more about the health effects of smoking with asthma.
- Air Pollution
Exposure to the main component of smog (ozone) raises the risk for asthma. Those who grew up or live in urban areas have a higher risk for asthma.
Children and adults who are overweight or obese are at a greater risk of asthma. Although the reasons are unclear, some experts point to low-grade inflammation in the body that occurs with extra weight. Obese patients often use more medications, suffer worse symptoms and are less able to control their asthma than patients in a healthy weight range.
While these factors increase a person's risk for developing the disease, there are additional factors, such as poverty and lack of health insurance, that contribute to more asthma symptoms, emergency room visits and hospitalizations. Learn more about ways to improve asthma by understanding the risks related to exposure to things in the environment that are known to make asthma worse and management steps.
What Is Asthma [video]Learn more
Reviewed and approved by the American Lung Association Scientific and Medical Editorial Review Panel. Last reviewed May 21, 2018.
Page Last Updated: April 29, 2019
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