Correction method of nasal bone protrusion: 1, nasal bone protrusion caused by external factors; Generally speaking, the deviation of nasal bone caused by external factors mainly refers to the deviation of nasal cone caused by pear-shaped bone, vertical plate of ethmoid bone and maxillary ridge, the involvement of upper or lower lateral cartilage and the deviation of nasal septum hard bone. If you want to treat it, you must first remove these external forces and correct the cartilage of the nasal septum. If these external factors cannot be completely solved, it is very likely that the operation will fail or the distortion will appear again after correction. 2. Biliang bone protrusion caused by internal factors; Nasal bone skew caused by internal factors mainly refers to the distortion of nasal septum cartilage during its growth and development or after trauma. This situation is usually corrected by removing some deformed cartilage or using some grafts and sutures. There are some traumatic nasal distortions. Because of its particularity and variability, open rhinoplasty is generally recommended.