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Bronchitis is the medical term for inflammation of the tubes that connect the mouth and nose with the lungs, the bronchi. The bronchi are the large airways that allow air to pass from the mouth or nose to the lungs where the exchange of oxygen and byproducts takes place. There are two types of bronchitis: acute and chronic. Acute bronchitis is usually caused by a cold or other upper respiratory infection that moves down into the bronchi. Acute bronchitis can be caused by either bacteria or viruses and will generally resolve in a few days on its own. Chronic bronchitis is generally due to smoking over time which causes a long-standing irritation of the airways and produce mucus, irritation and cough which is similar to acute bronchitis but not caused by viruses or bacteria. Chronic bronchitis will often recur or stick around for a longer period of time. Chronic bronchitis is one type of chronic obstructive pulmonary disease (COPD) with the other type being emphysema. Risk factors for both types of bronchitis include: smoking, upper respiratory illness, poorly functioning immune system (due to HIV or medications that weaken the immune system), gastroesophageal reflux disease (GERD), and lung irritants (like grains, textiles or fumes at the workplace). An acute episode of bronchitis can lead to complications such as pneumonia. Having acute bronchitis repeatedly can mean more serious problems such as chronic bronchitis (as mentioned above), asthma, lung disorders or immune system problems.
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