The Real Causes of Constant Phlegm and Mucus in the Throat
Having mucus in your throat doesn’t necessarily mean your body is producing an abnormal amount. Your nose and throat normally make mucus, which helps trap irritants and protect the airways. The problem is often that mucus is thicker than usual or draining into the throat.
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Common causes
Postnasal drip
Allergies, colds, sinus problems, dry air and nasal irritation can cause mucus to drain down the back of the throat. You may constantly swallow, cough or clear your throat.
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Allergies
Dust, pollen, mold and pet allergens can increase nasal mucus and cause postnasal drip.
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Acid reflux or silent reflux
Reflux can irritate the throat and cause chronic throat clearing, coughing, hoarseness and a sensation of excess mucus—even without classic heartburn.
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Smoking and environmental irritants
Cigarette smoke, pollution, dust and chemical fumes can irritate the airways and increase mucus production.
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Respiratory conditions
Persistent phlegm accompanied by coughing or breathing problems can occur with conditions such as chronic bronchitis, COPD or asthma.
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What can help
Drink enough water to keep mucus from becoming overly thick.
Try a saline nasal spray or rinse if you have nasal congestion or postnasal drip.
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A clean cool-mist humidifier may help when dry air is irritating your nose and throat.
Avoid cigarette smoke and other known irritants.
If reflux seems likely, avoid eating for at least 3 hours before bedtime and discuss persistent symptoms with a healthcare professional.
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Treat allergies if they’re the underlying cause rather than simply trying to suppress the mucus.
Don’t assume that yellow or green mucus automatically means you need antibiotics. Mucus color by itself cannot reliably identify a bacterial infection.
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When to get checked
See a healthcare professional if the problem is persistent or accompanied by fever, night sweats, unexplained weight loss, wheezing, shortness of breath, persistent nasal obstruction, or blood in the mucus.
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Bottom line: Persistent throat mucus is most often related to postnasal drip, allergies, reflux, infection, or airway irritation. Finding the underlying cause is much more effective than relying on a “mucus-cleansing” drink or home remedy.
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