A deviated nasal septum is not apparent externally; it requires a hospital examination including a nasal endoscopy and a sinus CT scan for a definitive diagnosis. A deviated nasal septum is a common and frequently occurring condition in otolaryngology, with about 90% of people having some degree of deviation. This condition is mainly due to abnormal nasal septum development during the embryonic stage or due to trauma to the nasal septum or compression from nasal tumors occurring later. When the nasal septum deviates to one or both sides, it primarily causes persistent, progressive nasal obstruction on both sides. It also accompanies symptoms like mucous nasal discharge, a sense of swelling or a foreign body in the nasal cavity, facial pain, and headaches. A deviated nasal septum can also lead to complications such as sinusitis and nasal polyps. Diagnosis can be confirmed at a hospital with a nasal endoscopy and sinus CT scan. Treatment involves surgical correction of the deviated nasal septum, which can cure the condition.