travel deeper into the respiratory system.
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The problem usually begins when mucus becomes thicker than usual, production increases, normal drainage changes, or the throat becomes irritated enough to create a persistent sensation of mucus even when relatively little is present.
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Common causes include respiratory infections, allergies, postnasal drip, dry air, dehydration, cigarette smoke, vaping, environmental pollution, and sinus irritation. Acid reflux can also contribute to chronic throat clearing, coughing, hoarseness, and a mucus-like sensation in some people.
For mild symptoms,