The Real Causes of Constant Phlegm and Mucus in the Throat — and How to Get Rid of It
Having mucus or the feeling of phlegm stuck in your throat is common. Your body naturally produces mucus to protect your airways, but too much mucus or a constant “something stuck” feeling may point to an underlying cause.
Common Causes of Constant Throat Mucus
1. Postnasal drip
One of the most common causes is mucus draining from the nose or sinuses down the back of the throat.
Possible triggers:
- Allergies
- Colds
- Sinus irritation
- Dust or pollution
Signs:
- Frequent throat clearing
- Feeling mucus dripping
- Cough that is worse at night
2. Acid reflux (including silent reflux)
Stomach acid or stomach contents can irritate the throat even without obvious heartburn.
Possible signs:
- Constant throat clearing
- Hoarse voice
- Lump-in-the-throat feeling
- Cough after meals or when lying down
3. Allergies
Allergic reactions can cause the body to produce extra mucus.
Common triggers:
- Pollen
- Dust mites
- Pet dander
- Mold
4. Dry air or dehydration
When the body lacks fluids, mucus can become thicker and harder to clear.
Helpful steps:
- Drink enough water
- Use a humidifier if indoor air is very dry
- Avoid excessive alcohol, which can contribute to dehydration
5. Smoking or exposure to irritants
Smoke and chemical fumes can inflame the airways and increase mucus production.
This includes:
- Cigarettes
- Secondhand smoke
- Strong cleaning chemicals
- Air pollution
6. Respiratory infections
A cold, flu, or other respiratory infection can leave extra mucus behind for days or weeks while the airways recover.
