A deviated septum is one of the most common causes of nasal obstruction and congestion. The nasal septum is the midline dividing wall of the nose. A deviated septum occurs when the septum is not perfectly in the midline, causing the left and right sides of the nose to be divided unevenly. This potentially results in an uneven flow of air through the nose resulting in the sensation of a blockage. The nasal septum is made up of the quadrangular cartilage anteriorly, the vomer bone posteriorly, the ethmoid bone superiorly, and the maxillary crest bone inferiorly. The bony-cartilaginous septum is covered by a mucosal lining. A deviated septum can be a result of crookedness to any or all of these portions of the septum.