The nasal septum was originally composed of several cartilage, but it was ossified separately before the appearance of the bony nasal septum. In the process of development, due to various reasons, the development of bones and cartilage is unbalanced. The deformity or deviation of bones inside the nose means that the nasal septum is curved. Under normal circumstances, the nasal septum is located in the middle of two nasal cavities. When it bends, one or both sides of the nose are blocked or affect the drainage of sinus, which requires surgical treatment.