A CT scan can detect a deviated nasal septum, which is a common and frequently occurring condition in otolaryngology, typically due to abnormal development of the nasal septum during the embryonic stage or from trauma or pressure from nasal tumors. When the nasal septum is deviated, it can cause persistent nasal congestion on both sides, as well as facial swelling, headaches, and may also lead to sinusitis or nasal polyps. Diagnosis can be confirmed with an endoscopic examination using an electronic nasal endoscope and a sinus CT scan at the hospital. If the deviation of the nasal septum is severe and accompanied by nasal congestion and headaches, surgical correction of the deviated septum may be necessary to completely resolve the symptoms.