In this situation, we need to consider various factors. The most common primary cause is a congenital uneven development of the nasal septum, which leads to what we call congenital deviation of the nasal septum. Another cause is abnormal development or injury acquired later in life. For example, one common issue is children who snore loudly for extended periods during sleep and breathe through their mouths; they can develop enlarged adenoids, which might cause the upper jaw to protrude. This, in turn, can lead to abnormal development and deviation of the nasal septum. Additionally, injuries often occur when children are playing or accidentally during physical activities, leading to a direct impact on the nasal septum. Without immediate and proper attention, this can cause a deviation in the septum as development continues.