Hello, there is a deviated nasal septum. To be clinically diagnosed as a deviated nasal septum, two criteria must be met: First, there must be structural deviation of the nasal septum. Second, you must have symptoms caused by a deviated nasal septum, such as nasal congestion, headache, and nosebleeds caused by a deviated nasal septum. Mild symptoms do not necessarily require surgery. Only if the symptoms aggravate or seriously affect the function of the nasal cavity, nasal septum surgery is performed. Today's nasal septum surgery is generally performed under a nasal endoscope to remove the deflected cartilage and bone tissue. The results after the surgery are generally relatively good. The most important thing during the surgery is to avoid perforation of the nasal septal mucosa when peeling off the nasal periosteum.