Miss this word in a medical record or job-site history, and a serious lung disease can be mistaken for ordinary shortness of breath, aging, or a smoking-related problem until the damage is permanent. Asbestosis is a long-term scarring of the lungs caused by breathing in asbestos fibers, usually over months or years of work or repeated exposure. That scarring makes it harder for the lungs to expand and move oxygen into the blood. It is not the same as lung cancer or mesothelioma, but the same asbestos exposure can increase the risk of those diseases too.

Practically, the label matters because symptoms often appear long after the exposure happened. A person may develop a chronic cough, chest tightness, reduced exercise tolerance, and worsening breathing problems years after construction, insulation, demolition, shipyard, or industrial work. Cold weather and physically demanding jobs can make those limits more obvious.

For an injury or occupational disease claim, asbestosis can affect causation, damages, and who may be legally responsible. Medical proof usually matters: imaging, pulmonary testing, and a work history tying the disease to asbestos exposure. If the exposure happened on the job in North Dakota, benefits may run through Workforce Safety and Insurance, the state's required workers' compensation fund for covered employers, rather than a standard personal injury claim against the employer. Third-party liability may still be an issue in some cases.