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Bronchitis causes swelling and irritation in the airways that lead to the lungs. Over time,tobacco smoke or other lung irritants can lead to long-term (chronic) bronchitis. It causes breathing problems and shortness of breath.

Chronic obstructive pulmonary disease (COPD) is an illness that makes it hard to breathe because air does not flow easily out of your lungs...

If you have chronic obstructive pulmonary disease (COPD), your usual shortness of breath could suddenly get worse...

Breathing is hard when you have chronic obstructive pulmonary disease (COPD). You may take quick, short breaths...

When you have COPD, you may have too much mucus in your lungs. Learning to clear your lungs may help you save energy and oxygen, it may also help prevent lung infections. There are three ways to clear your lungs: • Chest percussion • Controlled coughing • Postural drainage

Lung infections and pneumonia can be caused by bacteria or a virus. These infections can cause a fever, a cough that produces mucus, and trouble breathing.

Pneumonia is a lung infection that is usually caused by bacteria or a virus.

Oxygen therapy is used when you do not have enough oxygen in your blood. When this occurs, organs such as your heart do not receive enough oxygen to function properly.