The causes of right deviation of nasal septum are as follows: 1. Unbalanced development of column bones: The main reason for right deviation of nasal septum is the unbalanced development of column bones that make up nasal septum, forming different tension curves, resulting in abnormal connection between column bones. 2. Adenoid hypertrophy and high arch of hard palate in childhood: It can restrict the development of nasal septum and cause deviation of nasal septum. 3. Nasal trauma: It can cause fracture and misalignment of nasal septum, resulting in deviation of nasal septum. 4. Occupying nasal cavity lesion: the lesion gradually increases and compresses the nasal septum, which can also cause nasal septal deviation. Deviation of the nasal septum refers to the deviation of the nasal septum to one or both sides, with local elevation, causing nasal dysfunction, such as nasal congestion, headache or nasal bleeding, etc. The types of nasal septal deviation are C-shaped, S-shaped, sphenoid, etc.