According to The Mayo Clinic.com, "The thin wall inside your nose that separates your right and left nasal cavities is called your nasal septum. Ideally, your septum is situated in the center of your nose, equally separating the two sides of your nose. In about 80 percent of people, however, the nasal septum is displaced to one side, making one nasal passage smaller than the other. When your septum is significantly off-center, you have a deviated septum.
When a deviated septum is severe, it can block one side of your nose and reduce airflow. Resulting signs and symptoms can include difficulty breathing, nasal congestion, nosebleeds and frequent sinus infections.
Deviated septum may be present at birth or, more commonly, the result of an injury. Initial treatment of a deviated septum may include medications to manage signs and symptoms. But to correct a deviated septum, surgery is necessary."
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