A crooked nose can be caused by trauma, developmental abnormality, plastic surgery failure and nasal diseases. 1. Trauma: Nose in the impact and other exertion, resulting in nasal bone fracture, displacement and other conditions, can lead to distortion of the appearance of the nose performance, often accompanied by local swelling, pain, bleeding and other symptoms. 2. Developmental abnormality: If the nasal bone is abnormal due to congenital development, it can lead to bony or cartilaginous distortion of the nasal bone, resulting in the symptom of crooked nose. 3. Failure of plastic surgery: When you undergo rhinoplasty, if the operator is not skillful, or if you make mistakes in operation, or if you use materials and other reasons, it may cause failure of plastic surgery, which may lead to the symptoms of crooked nose. 4. Nasal diseases: when suffering from nasal polyps or tumors, due to the tumor’s invasion and destruction of nasal tissues or compression, it can cause a crooked nose; when suffering from osteofibrous anomalous proliferative disease, due to the abnormal proliferation of nasal tissues, it can also lead to a crooked nose. When the nose is crooked, you need to go to the hospital in time to check the specific cause and treatment, so as not to delay the condition.