The nasal septum divides the inside of the nose. During the final growth stage of adolescence, the septum expands and sometimes may bend or crease. This may lead to obstruction of nasal breathing to one or both sides. Other symptoms of a deviated septum include nasal drainage, nosebleeds, mouth breathing, and facial pressure. A crooked or deviated septum is not usually caused by an injury. Allergies or sinus infections may cause enlargement or swelling of the membranes of the nose further blocking nasal breathing.
Prescription nasal sprays, antihistamines and allergy testing and treatment sometimes control the symptoms of a deviated septum. A septoplasty is a commonly performed outpatient procedure that relieves the symptoms of a deviated septum with no further need for medication.