Asthma in Teens and Adults (cont.)
IN THIS ARTICLE
The cause of asthma is not known. Health experts believe that inherited, environmental, and immune system factors combine to cause inflammation of the bronchial tubes, which carry air to the lungs. This can lead to asthma and asthma attacks.
Asthma in adults also can be related to work (occupational asthma). Being around animals, plastic resin, wood dust, grain dust, insecticides, and metals can cause asthma, usually because your immune system reacts to the material. Some people continue to have asthma symptoms even after they are no longer exposed to what caused the symptoms. But for many people, symptoms will get better or go away when they are away from the asthma trigger.
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