Many patients come to the clinic saying that their physician said they have a deviated septum during the physical examination, but they do not have any discomfort themselves. In fact, what is a deviated septum? What kind of deviation requires surgical treatment? Overview: Any deviation of the nasal septum from the midline to one or two sides of the bend or local formation of protrusion, causing nasal dysfunction or symptoms, are called nasal septal deviation in fact, the nasal septum is rarely straight, such as no dysfunction, can not be diagnosed and treated. Etiology: (a) Trauma: Trauma is an important cause of this disease, which mostly occurs in childhood, and the history of trauma is often long forgotten. At that time, because the various components of the nasal septum are not fully developed, so it does not show symptoms, and later, with the growth of age, it gradually develops into nasal septal deviation. (2) Developmental abnormalities: unbalanced development of bone and cartilage, adenoid hypertrophy, open-mouth breathing since childhood, and restricted development of nasal septum in those with high arched hard palate can lead to deviation of nasal septum. (iii) Compression factors: Tumor or foreign body compression in the nasal cavity may cause the nasal septum to deviate to one side. Symptoms: (a) Nasal congestion: alternating or persistent. (ii) Headache: The deviated part compresses the turbinate, which may cause ipsilateral reflex headache. (c) Rhinorrhea: Many patients come to the clinic saying that the physician said they have deviated nasal septum during physical examination, but they do not have any discomfort. In fact, what is a deviated septum? What kind of deviation needs to be treated surgically? The only option for treatment of this disease is surgery after diagnosis. The surgical methods are nasal septal submucosal resection and nasal septal submucosal correction. The latest power system is also used to perform nasal septal cartilage and bone resection. The procedure is a minor surgery with a high success rate and the physician will try to avoid complications during the procedure. The mucous membrane at the convex side or crest and talus of the deviation becomes thin and is often irritated by air currents or dust, so dry erosion often occurs, leading to nasal bleeding. The diagnosis of nasal septal deviation needs to be determined by the physician based on the patient’s symptoms and examination results. If there is no dysfunction, the diagnosis and treatment may not be made. Treatment The only option after the diagnosis of the disease is surgery. The surgical methods are submucosal resection of nasal septum and submucosal correction of nasal septum. The latest power system is also used to perform nasal septal cartilage and bone resection. The procedure is a minor surgery with a high success rate and the physician will try to avoid complications at the time of surgery.