The Real Causes of Constant Phlegm and Mucus in the Throat
Constant throat mucus is common, but it doesn’t necessarily mean your body is “producing too much mucus.” Several conditions can create that sensation.
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Common causes
Postnasal drip — Allergies, sinus problems, colds, dry air and nasal irritation can cause mucus to drain down the back of your throat. Frequent throat-clearing and coughing are common.
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Acid reflux or silent reflux — Reflux reaching the throat can cause throat clearing, hoarseness, chronic cough and a sensation of excess mucus, sometimes without obvious heartburn.
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Allergies — Pollen, dust mites, pets and mold can trigger excess mucus and postnasal drip.
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Smoking and other irritants — Tobacco smoke, pollution, dust and chemical fumes can irritate the airways and increase mucus.
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Asthma or chronic lung disease — Persistent phlegm, particularly when accompanied by coughing or breathing problems, can occur with asthma, COPD and other lung conditions.
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What can help?
Drink adequate water to help keep secretions thinner.
Try a saline nasal spray or rinse if nasal congestion or postnasal drip is involved.
A clean cool-mist humidifier may help if dry air is irritating your nose and throat.
Avoid cigarette smoke and other known irritants.
If reflux seems likely, avoid eating for about 3 hours before lying down and discuss persistent symptoms with a healthcare professional.
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If allergies are suspected, treating the allergy itself is generally more useful than simply trying to suppress mucus.
Don’t assume that yellow or green mucus automatically means you need antibiotics. Mucus color alone doesn’t reliably establish a bacterial infection.
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When to get checked
Persistent phlegm deserves medical evaluation if it lasts for weeks or is accompanied by shortness of breath, wheezing, fever, night sweats, unexplained weight loss, chest pain, or blood in the mucus.
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Bottom line: The most common culprits are postnasal drip, allergies, reflux and airway irritation. Finding and treating the underlying cause is usually the best way to get rid of persistent throat mucus.
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