Curvature of the nasal septum (deviation of the nasal septum, deformation of the nasal septum, ridge of the nasal septum, spike of the nasal septum) is a change in its shape that occurs as a result of injury (fracture) or abnormal formation of its bone-cartilaginous skeleton, causing difficulty in nasal breathing or the development of changes or diseases of adjacent organs (nasal turbinates, paranasal sinuses, middle ear, etc.),