The possible causes of a crooked nose include congenital developmental abnormality, trauma and nasal diseases. 1. Abnormal congenital development: During the congenital growth and development process, due to the uneven development of the nasal bone, which leads to the phenomenon of crooked nose, such as the situation is relatively mild, does not affect the normal breathing and aesthetics, can not be treated with special treatment, you can also choose the surgical way to repair. 2. Trauma: due to car accidents, impact injuries, falls and other factors can cause fractures and displacement of the nasal bone, resulting in a crooked nose, usually accompanied by local pain, swelling symptoms, need to consult a doctor in a timely manner, and after diagnosis can be corrected through the fracture of the nasal bone restoration surgery to correct the shape of the nose. 3. Nasal lesions: Nasal polyps or nasal tumors and other space-occupying lesions can lead to distortion and swelling of the nasal bone area, resulting in a crooked nose. Generally, it is necessary to find out the cause of the disease, and the original shape of the nose can be restored by removing the hyperplastic tissues through surgery. 4. Other: such as rhinoplasty, due to medical accidents and other problems can also lead to a crooked nose, mild cases can be reset by manipulation, serious cases need to be repaired again by surgery. If you have a crooked nose, you need to consult a doctor in time to find out the cause of the disease under the guidance of the doctor and actively cooperate with the treatment.