Constant phlegm or the feeling of mucus in the throat is common, but it’s usually a symptom, not a disease itself. The most effective treatment depends on the underlying cause.
Common causes
- Postnasal drip (the most common cause)
- Mucus from the nose or sinuses drips down the back of the throat.
- Often caused by allergies, colds, sinus infections, or irritants.
- Symptoms include frequent throat clearing, a tickling sensation, and a cough.
- Acid reflux
- Gastroesophageal reflux disease can cause stomach acid to irritate the throat, leading to excess mucus, hoarseness, chronic cough, or a sensation of a lump in the throat.
- Allergies
- Seasonal or indoor allergies (dust mites, pet dander, mold, pollen) increase mucus production.
- Respiratory infections
- Viral colds, influenza, COVID-19, or bacterial infections can temporarily increase mucus production.
- Smoking or exposure to irritants
- Tobacco smoke, air pollution, strong chemicals, or vaping can irritate the airways and increase mucus.
- Chronic lung conditions
- Conditions such as Asthma, Chronic obstructive pulmonary disease, or Bronchiectasis may cause persistent mucus and cough.
- Dehydration
- Not drinking enough fluids can make mucus thicker and harder to clear.
How to help get rid of it
- Drink plenty of water to thin mucus.
- Use a saline nasal spray or nasal rinse if postnasal drip is the cause.
- Avoid smoking and secondhand smoke.
- Use a humidifier if the air in your home is very dry.
- If allergies are the cause, reducing exposure to triggers and using appropriate allergy medications may help.
- If acid reflux is contributing:
- Avoid large or late-night meals.
- Limit spicy, fatty, or acidic foods if they trigger symptoms.
- Elevate the head of your bed if symptoms occur at night.
- Honey (for adults and children over 1 year old) or warm fluids may soothe throat irritation.
When to see a healthcare professional
Arrange an evaluation if:
- Symptoms last more than 3–4 weeks.
- You have recurrent sinus infections.
- You cough up blood.
- You have unexplained weight loss, persistent fever, or night sweats.
- You have difficulty swallowing or worsening hoarseness.
- You develop chest pain or significant shortness of breath.
Mucus color: what it means
The color of mucus does not reliably tell you whether an infection is viral or bacterial. Green or yellow mucus often reflects the body’s immune response and does not automatically mean antibiotics are needed.
If your mucus has persisted for several weeks, describing your age, whether you’re a smoker, the color of the mucus, whether you have a cough, nasal congestion, heartburn, or allergies, and how long the symptoms have lasted can help narrow down the most likely cause.
