People with a deviated nasal septum should generally avoid using breathing machines, as the deviation is a bony misalignment that can cause persistent nasal congestion. If a breathing machine is used, the airflow from the machine can irritate the nasal septum membrane, leading to erosion, and in severe cases, cause local rupture and bleeding. A deviated nasal septum is a common and frequent condition in otolaryngology, typically caused by abnormal nasal septum development during the embryonic stage, or by subsequent trauma or tumoral pressure, causing the septum to deviate to one or both sides. This deviation can lead to continuous bilateral nasal congestion, along with a sensation of a foreign body in the nasal passages, swelling, headaches, and other related symptoms. It is advised to consult a hospital for an examination, where a diagnosis can be confirmed with an endoscope. For treatment, the deviated nasal septum usually requires surgical correction, which can effectively cure the condition.