Three common causes of excess mucus are:
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Respiratory Infections: Viral or bacterial infections like the common cold, flu, or bronchitis irritate the lining of your respiratory system, triggering increased mucus production to help flush out pathogens. This mucus may be thicker and discolored (yellow or green). [Sources: Medical News Today, Healthline, CDC, Cleveland Clinic]
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Environmental Irritants: Exposure to allergens (pollen, dust mites, pet dander), pollutants (smoke, dust), or dry air can irritate the mucous membranes, leading to increased mucus production. A dry indoor environment, often caused by heating or air conditioning, is a prime example. [Sources: Healthline, Reference provided: A dry indoor environment (due to heat or air-conditioning)]
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Certain Medical Conditions: Conditions such as asthma, cystic fibrosis, and chronic bronchitis are characterized by chronic inflammation and increased mucus production. Asthma causes inflammation and constriction in the airways leading to thick mucus, while cystic fibrosis involves genetic mutations leading to thick, sticky mucus. Chronic bronchitis is defined by a persistent cough producing mucus for extended periods. [Sources: Cleveland Clinic, Mayo Clinic, Cystic Fibrosis Foundation, MedlinePlus]
While dehydration (from not drinking enough fluids or consuming diuretics like coffee, tea, or alcohol) and certain medications can also contribute to changes in mucus consistency and production, they are less direct causes of increased mucus production in the same way as the three listed above. [Source: Reference provided: Not drinking enough water or other fluids; Drinking beverages such as coffee, tea, or alcohol, which can lead to dehydration; Taking certain medications]
