The cartilage in the middle of the nose is deviated to one side, which belongs to deviated nasal septum, and may be caused by heredity, developmental abnormality, and trauma. 1. Heredity: Generally, if the father has a long skull and the mother has a flat skull, the offspring may have a huge nasal septum and a narrow nasal cavity, which may lead to a deviated nasal septum with no room for growth, and a deviated nasal septum may be formed during development, which can be corrected by endoscopic septal deviation correction surgery, which can correct the crooked septal cartilage. 2. Developmental abnormality: Generally, the patient’s nasal bone, jaw bone and palate bone develop earlier, but the development of nasal septum cartilage is later, which may lead to the development of nasal septum being restricted in many aspects, coupled with the obstruction of vertical plate of sieve bone and plow bone, which may easily lead to the deviation of nasal septum. 3. Trauma: The symptoms of nasal trauma in childhood are not obvious, but with age, the growth and ossification of septal bone and cartilage are abnormal, which can lead to septal deviation. The cartilage in the middle of the nose is deviated to one side can actively go to the hospital to confirm the diagnosis, under the guidance of the doctor’s instructions for standardized treatment.