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Postnasal drip can lead to throat irritation, coughing, or even chronic laryngitis if left untreated.

Hyposmia, or a reduced sense of smell, can result from sinus issues, viral infections, or other underlying causes.

Difficulty breathing through the nose or "nasal obstruction" is the medical term for stuffy and congested nose

Chronic sinusitis, nasal breathing issues, and allergies are all approached similarly. Each of these conditions is often associated with inflamed mucous membranes inside the nose.