Nasal septal deviation is not hereditary. The main causes of nasal septal deviation are due to different growth rates of the nasal septal cartilage in patients during infancy and adolescence, which leads to tension-induced deviation, or due to local trauma caused by impact, resulting in deviation of the patient's nasal septum. For the symptoms mentioned above, they mainly cause nasal congestion, headaches, nosebleeds, and other related conditions. The primary treatment method for patients with nasal septal deviation involves the submucosal removal of cartilage under functional endoscopy, in order to correct the deviated parts of the patient's nasal septum. This is done with the goal of restoring normal airflow in the nasal passages and alleviating contact headaches.