DefinitionBy Mayo Clinic staff
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A deviated septum occurs when the thin wall (nasal septum) between your nostrils is displaced to one side. Your septum separates your right and left nasal cavities and ideally is situated in the center of your nose, equally separating the two sides. However, in many people, the nasal septum is displaced, making one nasal passage smaller.
When a deviated septum is severe, it can block one side of your nose and reduce airflow, causing difficulty breathing, nosebleeds and other symptoms.
Treatment of nasal obstruction may include medications or adhesive strips to manage symptoms. But to correct a deviated septum, surgery is necessary.
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