constantly, the pattern may point toward an underlying trigger such as postnasal drip, allergies, respiratory infection, smoking, asthma, acid reflux, dehydration, environmental irritation, sinus problems, or chronic lung disease.
The key is to pay attention to duration, frequency, associated symptoms, and changes from your normal baseline.
Occasional phlegm after a cold is usually very different from coughing up mucus every day for months.
And if persistent phlegm is accompanied by breathing difficulties, chest pain, unexplained weight loss, persistent fever, or blood, don’t simply assume it’s a minor problem.
Your body may not be “warning” you through phlegm in every case—but
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