Nasal septum surgery, generally referred to as corrective surgery for a deviated septum, does not have sequelae in most cases. Complications such as septal hematoma, abscess and perforation may occur, and sequelae such as collapse of the bridge of the nose are less likely to occur. 1. Nasal septum hematoma: it is often due to the incomplete correction of the nasal septum after the operation that there still exists deviated bone or cartilage pieces, which leads to bleeding caused by the cartilage membrane on both sides not being closely adhered to; in addition, uneven filling of nasal cavity on both sides, acute inflammation of nasal cavity not being controlled before the operation, and forceful blowing of the nose or sneezing after the operation will also lead to the appearance of hematoma. 2. Nasal septal abscess: mostly caused by secondary infection of nasal septal hematoma. 3. Nasal septum perforation: It may be due to symmetrical perforation of nasal mucosa during surgery, which is not treated effectively. It may also be caused by ischemic necrosis of the nasal mucosa due to tight filling of the nasal cavity during the operation. 4. Nasal bridge collapse: caused by removing too much nasal cartilage during surgery. Corrective surgery for deviated nasal septum, with mature technology and standardized operation, is less likely to have complications or sequelae, and it is recommended that if any abnormality is found after the surgery, the patient should consult a doctor for standardized diagnosis and treatment in time.