The Real Causes of Constant Phlegm and Mucus in the Throat
Constant throat mucus is common and doesn’t necessarily mean there’s an infection or “toxins” that need to be cleansed. Your nose, sinuses, throat and airways naturally produce mucus; the problem is usually that you are producing more than usual or becoming more aware of it.
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Common causes
Postnasal drip: Allergies, colds, sinus problems, dry air and some medications can cause mucus to drain down the back of your throat.
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Acid reflux: “Silent reflux” (laryngopharyngeal reflux) can cause excessive mucus, throat clearing, coughing, hoarseness or a lump-like sensation—even without heartburn.
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Frimley Health Foundation Trust
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Allergies: Pollen, dust, pets and other allergens can increase nasal secretions.
Smoking and air pollution: Irritants can stimulate mucus production and inflame the airways.
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Respiratory conditions: Asthma, chronic bronchitis, COPD and respiratory infections can cause phlegm, particularly when you’re coughing mucus up from the chest.
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Dryness/dehydration: Thick secretions can become much more noticeable when you’re dehydrated or breathing dry air.
What can help?
Drink adequate water to help keep mucus thinner.
Try a saline nasal spray or rinse if you have nasal congestion or postnasal drip.
A clean cool-mist humidifier can help when indoor air is dry.
Gargle with warm salt water to soothe an irritated throat.
If reflux seems likely, avoid eating for about 3 hours before lying down and identify foods or drinks that trigger symptoms.
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Avoid cigarette smoke and other respiratory irritants.
Try not to repeatedly forcefully clear your throat. Frequent throat clearing can itself irritate the throat and perpetuate the sensation of having mucus.
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West Suffolk NHS Foundation Trust
Mucus color isn’t enough to determine whether you have a bacterial infection. Yellow or green mucus can occur for several reasons and doesn’t automatically mean antibiotics are needed.
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When to get checked
See a healthcare professional if the problem continues for several weeks, keeps worsening, or is accompanied by fever, night sweats, unexplained weight loss, persistent nasal obstruction, wheezing, breathing difficulty, or blood in the mucus.
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Bottom line: Persistent throat mucus is most commonly related to postnasal drip, allergies, reflux, irritation, or a respiratory condition. The most effective treatment is to identify the underlying cause rather than trying a “mucus cleanse.”
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