A deviated septum occurs when the thin wall (nasal septum) between your nasal passages is displaced to one side. This can cause one nasal air passage to be smaller than the other, leading to breathing difficulties, congestion, headaches, and other symptoms. The most common symptom of a deviated septum is trouble breathing through the nose, which is often worse on one side.

There are several causes of a deviated septum, including:

• Congenital: Some people are born with a deviated septum, which may develop before birth or occur during delivery.

• Injury: A deviated septum can also be the result of an injury that causes the nasal septum to be moved out of position. In infants, such an injury may occur during childbirth. In children and adults, a wide array of accidents may lead to a nose injury and deviated septum. Trauma to the nose most commonly occurs during contact sports, rough play, or an auto accident.

• Normal development: A deviated septum can also be a result of normal development. As your nose grows, your septum also grows and can sometimes lean toward one side. This is the most common cause of a deviated septum.

Most people have a deviated septum, but those with little to no symptoms may not even know it. However, if you have a severely deviated septum, you may develop complications, including nasal blockage or congestion, recurring sinus infections, and nosebleeds. If you suspect you have a deviated septum, it is important to see a healthcare provider for a diagnosis and treatment options.