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asthma develops when a person is exposed to a
particular inhaled substance in the workplace. The term refers to new cases of
asthma. But workplace exposure to substances that cause airway irritation or
inflammation can make asthma worse in people who already have the condition.
About 10% of adult asthma is classified as occupational asthma.1
Occupational asthma is the most common form of work-related lung
disease in many countries. When a person develops asthma as an adult,
occupational exposure is a likely cause.
There are some things that may cause occupational asthma and certain
professions in which people might be exposed to them. These include:
People who have occupational asthma usually have symptoms during the
workweek, such as coughing, wheezing, and chest tightness. These may develop
hours after leaving the workplace. Symptoms generally improve during weekends
The diagnosis of occupational asthma requires detailed documentation
of exposure to irritants or
allergens in the workplace and evidence that these
substances are causing symptoms. In a test called specific inhalation
challenge, you are exposed to a small amount of a possible workplace irritant
or allergen. Lung function is then measured to find out whether the substance
is the cause of symptoms.
Treatment of occupational asthma consists of:
You may need to change your job if your symptoms do not improve even
when you avoid possible triggers and take medicines. Talk with your doctor or asthma specialist before changing your job.
Tarlo SM, Liss GM (2003). Occupational asthma: An
approach to diagnosis and management. Canadian Medical Association Journal, 168(7): 867–871.
February 22, 2013
E. Gregory Thompson, MD - Internal Medicine
& Rohit K Katial, MD - Allergy and Immunology
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