A deviated nasal septum can potentially impact normal breathing, depending primarily on the severity and specific location of the deviation. If the deviation is mild and does not affect the ventilation of the nasal cavity, it will not impact normal breathing. However, if the nasal septum deviation is more pronounced, especially if it occurs in the middle, or affects the middle or front sections of the nasal cavity, it can interfere with normal airflow and lead to nasal congestion, which may affect breathing. In cases where nasal obstruction is significant and the septum deviation is severe, it is generally considered necessary to perform a septoplasty under endoscopy. After surgery, most patients can achieve effective relief and recovery.