The headline is mostly accurate but oversimplified. Constant mucus or phlegm in the throat has several possible causes, and the right treatment depends on the cause.
Common causes
- Postnasal drip: Allergies, colds, sinus problems and dry air can cause mucus to drain from the nose into the throat. This often causes throat-clearing, coughing or a “lump” sensation. (Cleveland Clinic)
- Acid reflux/LPR: Reflux can irritate the throat and cause mucus, chronic throat-clearing, hoarseness or coughing—even without typical heartburn. (Cleveland Clinic)
- Allergies: Dust, pollen, mold and other allergens can increase mucus production. (Cleveland Clinic)
- Respiratory infections: Colds, flu, sinus infections and bronchitis can temporarily produce more mucus. (nhs.uk)
- Smoking and air pollution: These irritate the airways and can increase phlegm. (Cleveland Clinic)
- Asthma or chronic lung disease: Persistent phlegm, especially when you’re coughing it up from the chest, can sometimes be associated with asthma, COPD or other lung conditions. (Cleveland Clinic)
What may help
Drink plenty of water to help keep mucus thinner. A saline nasal spray/rinse can help when postnasal drip is involved, and a clean cool-mist humidifier may help if the air is dry. (Cleveland Clinic)
If reflux seems likely, avoiding meals for several hours before bedtime and elevating your head while sleeping may help. (Cleveland Clinic)
Try not to repeatedly forcefully clear your throat, since that can further irritate it.
When to see a doctor
If the mucus/phlegm continues for several weeks, keeps returning, or is accompanied by unexplained weight loss, fever/night sweats, breathing difficulty, chest pain or wheezing, you should be evaluated. Coughing up blood requires prompt medical attention. (nhs.uk)
Also, yellow or green mucus doesn’t automatically mean you need antibiotics; mucus color by itself isn’t a reliable way to diagnose a bacterial infection. (Cleveland Clinic)
If you tell me whether your mucus is clear, white, yellow or green, and whether you have nasal congestion, cough, heartburn, or mucus mainly in the morning, I can help narrow down the most likely cause.
