Deviated septum does not always require surgery, but only when there are obvious clinical symptoms. Deviated nasal septum is relatively common and can be caused by uneven development of the cartilages that make up the nasal septum, fracture and dislocation of the cartilages after trauma. A deviated nasal septum can be seen on one or both sides, or localized protrusion. Partial septal deviation can cause nasal dysfunction, such as nasal congestion, headache and rhinorrhea; it can also be only physiological deviation without clinical symptoms. Not all septal deviations require surgery, and physiologic deviations may not require intervention. If there are clinical symptoms, surgery is required. It is recommended that people with the above symptoms go to the ENT department for a clear diagnosis and standardized treatment after examination.