The Real Causes of Constant Phlegm and Mucus in the Throat — And How to Get Rid of It

Having a throat constantly filled with mucus can be uncomfortable, annoying, and even embarrassing. While many people simply assume it’s a cold or allergies, there are several underlying causes that can lead to persistent phlegm. Understanding them is the first step toward relief.

Why Phlegm and Mucus Accumulate

Mucus is a natural substance produced by your respiratory system to trap dust, bacteria, and other irritants. However, too much mucus or phlegm in the throat can signal that something is off. Common causes include:

1. Allergies

Dust, pollen, pet dander, or mold can trigger your body to produce excess mucus as a defense mechanism. This often comes with sneezing, watery eyes, or a runny nose.

2. Post-Nasal Drip

This occurs when excess mucus from the nasal passages drips down the back of the throat. It’s commonly caused by sinus infections, colds, or allergies.

3. Respiratory Infections

Viral infections like colds or the flu, as well as bacterial infections, can lead to thick, sticky phlegm. Chronic bronchitis or pneumonia can also contribute.

4. Acid Reflux (GERD)