Bone spur formation is seen on the left side of the irregularly deviated nasal septum is considered to be the result of developmental abnormalities, trauma, and nasal occupancy. Bone spurs are mostly bone spurs or bone crests. 1. Developmental abnormality: nasal septum is composed of three bones: nasal septal cartilage, vertical plate of sieve bone and pear bone. In the process of growth and development and ossification, if the development between bone and cartilage or bone and bone is not balanced, it may form the deviation of nasal septum, which may show the S-shape, C-shape, or bone ridge and bone spine, etc. Therefore, it can be seen that bone spurs are formed on the left side of the irregularly deviated nasal septum. 2. Trauma: if children have nasal trauma, the symptoms are not obvious, but with the growth of age, the growth and ossification of septum bone and cartilage may be abnormal, leading to septal deviation; or adult nasal trauma due to septal fracture, dislocation and other cases of septal deviation, so the irregular left side of the septum can be seen in the formation of bony spurs. 3. Nasal cavity occupying: when the right nasal cavity occupying lesion, the gradual increase of the lesion compresses the nasal septum can also lead to the deviation of the nasal septum, resulting in the formation of bone spurs on the left side of the irregular deviation of the nasal septum. When the above conditions are found, if they do not cause nasal congestion, headache, nosebleed, etc., they can not be dealt with for the time being; if they cause obvious symptoms, it is recommended to consult the hospital as soon as possible and have them corrected by surgery.