worse when cleaning a dusty room or spending time around a particular animal.
Identifying and reducing exposure to triggers can be an important part of managing allergy-related mucus.
A Cold or Other Respiratory Infection May Be the Cause
If your phlegm appeared relatively suddenly, an infection may be responsible.
Common respiratory infections can cause inflammation and increased mucus production.
You may also experience:
Cough
Sore throat
Runny nose
Nasal congestion
Fatigue
Headache
Mild fever or chills
During an infection, mucus can become thicker and may change color.
This is important
