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What causes excess mucus in older people?

Excess mucus, also known as phlegm, is a common and often frustrating issue for older adults, with age-related changes significantly impacting the respiratory system's ability to clear irritants. As people get older, a combination of physiological changes and increased prevalence of certain health conditions contribute to the problem. Understanding the various factors that cause excess mucus in older people is the first step toward effective management and improving quality of life.