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What is a Lung Disease?

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About.com Health's Disease and Condition content is reviewed by Sanja Jelic, MD

Question: What is a Lung Disease?

Answer: Lung disease is any disease or disorder that impairs the function of the lungs.

Lung diseases can be separated into three categories: 1) obstructive, 2) restrictive, and 3) defective.

  • Obstructive lung diseases cause a narrowing or blockage of the airways resulting in a decrease in exhaled air flow. The most common obstructive lung diseases are asthma, chronic bronchitis, and emphysema.
  • Restrictive lung diseases decrease the total volume of air the lungs can hold. This is typically due to a decrease in the elasticity of the lungs or the inability of the chest wall to expand during inhalation. Examples of restrictive lung diseases are asbestosis, sarcoidosis and pulmonary fibrosis.
  • Defective lung diseases decrease the lung’s ability to move oxygen from its air sac tissues to the blood.
  • Although there are many lung diseases, some of the most common are:

  • Asthma
  • Chronic Obstructive Pulmonary Disease (COPD)
  • Cystic Fibrosis (CF)
  • Emphysema
  • Lung Cancer
  • Mesothelioma
  • Tuberculosis
  • There are many causes of lung disease. Here are just a few:

  • Smokingcigarette, cigar, and pipe smoke
  • Exposure to Radon Gas - radon occurs in soil and rocks
  • Asbestosa natural fiber that comes from minerals
  • Pollutionair pollutants, such as car exhaust
  • Lung diseases are diagnosed and treated in many different ways depending upon the type and stage of disease, family history, patient’s medical history, and the health and age of the patient.

    To lower your risk of lung disease:

  • Do not smoke or quit smoking immediately.
  • Stay away from dust and irritants or protect your lungs and air passages by wearing protective devices such as dust masks.
  • Get a spirometry test regularly to assess your lung’s ability to move air.
  • Comments? Questions? Share them with other lung disease patients at the Lung Diseases Forum.

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