Chronic obstructive lung disease (COLD) is an umbrella term for a group of conditions that make it difficult to fully empty the lungs of air. For this reason, people with COLD often experience breathlessness. The disease requires prompt medical treatment to prevent dangerous complications. There are various causes of the signs and symptoms of COLD. Severity and prognosis will vary from person to person depending on the underlying cause and advancement of the disease.
When a person has a chronic obstructive lung disease, this means their lungs are damaged, or their airways have become narrowed, making it harder and slower to exhale. When the person finishes breathing out, a large amount of air remains in the lungs. The effects of COLD are felt more during physical exercise because an increased rate of breathing gives the person less time to empty their lungs before the next breath.
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