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What causes hypersensitivity pneumonitis?

Hypersensitivity pneumonitis is caused by repeated inhalation of foreign substances to which a person has an allergic reaction. Farmer's lung is the most common type of hypersensitivity pneumonitis and happens due to repeated inhalation of hay particles that contain heat-loving bacteria. Exposure to bird droppings also may cause this disease. Breathing in air that contains fungus from humidifiers, air conditioners, and heating systems may also cause this illness. Inhalation of wood dust, chemicals used in manufacturing, and chemicals used in food processing and farming all may lead to hypersensitivity pneumonitis.

Continue Learning about Hypersensitivity Pneumonitis

Will everyone exposed to common dusts get hypersensitivity pneumonitis?
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No, only a small number of people exposed to common workplace dusts get hypersensitivity pneumonitis...
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Is hypersensitivity pneumonitis serious?
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Yes, hypersensitivity pneumonitis is serious. If left untreated, the acute form of this illness can ...
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What are the treatment options for hypersensitivity pneumonitis?
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Treatment for hypersensitivity pneumonitis involves avoiding the substance causing the reaction. If ...
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Can hypersensitivity pneumonitis be prevented?
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Hypersensitivity pneumonitis can be avoided by staying away from workplaces that contain dust and ch...
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.