It is known that approximately 80% of the population has septum deviation. It is a condition that makes breathing through the nose difficult. Septum deviation may be congenital or develop after nasal trauma. Septum deviation may occur during adolescence, when the nose is developing, without any of these reasons. One of the most common symptoms of deviation is nasal congestion. Nasal congestion may be unilateral or bilateral. It is often more noticeable on one side. Recurrent sinus infections can also be a symptom of deviation. In addition to nasal congestion, sometimes • Nosebleeds • Facial pain • Headache • Loud breathing and snoring may also occur during sleep. Obstructive Sleep Apnea, which is caused by obstruction in the upper airways during sleep, is a condition that is often accompanied by septum deviation. In cases where medical treatment is not sufficient, a surgical procedure called septoplasty (cartilage and/or bone curvature surgery) may be required to repair the deviation and improve breathing. .