Learn About Asbestosis

Key Facts:

• Asbestos is a naturally-occurring mineral used as an insulation material and as a fire retardant. Exposure to asbestos can occur in certain occupations.
• Inhaling large amounts of asbestos fibers or its dust over a long period of time can produce scarring of lung tissue. This scarring is called asbestosis.
• Asbestosis is one of over 200 types of pulmonary fibrosis and is also classified as an interstitial lung disease. You may hear your condition referred to by either of these names.
• The severity of asbestosis partially depends on how long you were exposed to asbestos and the amount you inhaled.
• There is no cure for asbestosis, but treatment can help slow the progression of the disease and relieve symptoms.

What Causes Asbestosis?

Asbestosis is caused by exposure to high levels of asbestos fibers. The airborne fibers and dust can become trapped in the alveoli (tiny air sacs in the lung at the end of the airways) or can migrate to the lining outside of the lung (called the pleura). The fibers can irritate the lung and cause swelling or scarring inside or around the lung. Smoking can increase the amount of damage done by asbestos and speed up the progression of the disease.

Who is at Risk?

The main group at risk for asbestosis is people who worked in mining, milling, manufacturing, installation or removal of asbestos products before the late 1970s. With strict regulations in the United States, developing asbestosis from exposure on the job now is much less likely. Nonetheless, many workers in construction and some other industries still face potentially significant workplace exposure, particularly when they work with old equipment or participate in the demolition or renovation of older buildings. People who spend time around those who work in these industries, and those who launder their work wardrobe, are also at risk.

You can find more information about risk factors and work rules designed to protect workers against asbestos on the Occupational Safety and Health Administration (OSHA) website.

Many homes that were built before 1977 may have asbestos in materials such as pipes, popcorn ceiling and floor tiles. Asbestosis is unlikely to occur from asbestos that is enclosed and undisturbed. If the fibers are contained and the asbestos is not loose or crumbling, you are not at risk of developing asbestosis. If you are renovating a home, asbestos should be handled by trained and certified professionals.