construction sites
During cleaning
At work
Near cigarette smoke
When exposed to strong chemicals
During periods of poor air quality
If your symptoms consistently improve when you leave a particular environment, environmental exposure may be contributing.
People who work around dust, chemicals, industrial fumes, or other respiratory irritants may need appropriate workplace protection and medical evaluation if symptoms persist.
Chronic Bronchitis Can Cause Long-Term Phlegm
If you have been coughing up phlegm regularly for a long time, chronic bronchitis is another possible explanation.
Chronic bronchitis is a type of chronic
