If you’re fact-checking this headline, constant mucus or phlegm in the throat has several possible causes, and it isn’t necessarily a sign of a serious disease.
Common causes
- Postnasal drip — mucus from allergies, a cold, or sinus problems drains down the back of the throat. (Cleveland Clinic)
- Allergies — pollen, dust mites, mold and pet dander can increase mucus production. (Cleveland Clinic)
- Acid reflux/LPR — reflux reaching the throat can cause excess mucus, throat clearing, hoarseness and a feeling of something stuck there, sometimes without heartburn. (Cleveland Clinic)
- Respiratory infections — colds, flu and sinus infections can temporarily increase and thicken mucus. (Cleveland Clinic)
- Smoke and other irritants — smoking, vaping, dust, chemicals and polluted air can irritate the airways and increase mucus. (Mayo Clinic)
- Asthma or chronic lung disease — persistent phlegm can sometimes be related to asthma, COPD, bronchiectasis or other respiratory conditions. (Cleveland Clinic)
What may help
- Drink enough fluids to keep mucus thinner.
- Try a saline nasal spray or rinse if postnasal drip is suspected.
- Treat known allergies and avoid their triggers.
- Avoid smoking and secondhand smoke.
- If reflux seems likely, avoid eating for several hours before bedtime and discuss persistent symptoms with a clinician. (Cleveland Clinic)
See a doctor if the problem persists, particularly if you have unexplained weight loss, fever/night sweats, persistent nasal obstruction or nosebleeds, shortness of breath, or blood in the phlegm. (Cleveland Clinic)
Also, yellow or green mucus by itself does not necessarily mean you need antibiotics. (Cleveland Clinic)
