A runny nose (rhinorrhea) is excess drainage from the nose, which may be thin and clear or thick and colored. It is commonly caused by the common cold, allergies, flu, sinus infections, or irritants. While usually harmless, persistent or one-sided drainage may warrant medical evaluation.
Runny Nose
A runny nose (rhinorrhea) is excess drainage from the nose, which may be thin and clear or thick and colored. It is commonly caused by the common cold, allergies, flu, sinus infections, or irritants.
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Sources & References
- Mayo Clinic — mayoclinic.org
- National Institutes of Health (NIH) — nih.gov
- Centers for Disease Control and Prevention (CDC) — cdc.gov
- MedlinePlus — medlineplus.gov
- Cleveland Clinic — my.clevelandclinic.org
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