Nasal septum deviation refers to the condition where the cartilaginous and bony tissue of the nasal septum leans to one side, affecting one or both nasal cavities. Clinically, it primarily presents as nasal congestion. This congestion is unilateral and persistent, or it can be persistent on both sides. Additionally, nosebleeds occur because the mucous membrane on the deviated side is very thin, making it susceptible to bleeding due to friction from the airflow during breathing. Furthermore, the deviated nasal septum can irritate the turbinates, leading to nerve reflex pain and resulting in headaches. Thus, the main symptoms of nasal septum deviation include the ones listed above.