Deviated septum: - Learn about the causes

Deviated Septum - Learn about the causes, symptoms, diagnosis & treatment from the Merck Manuals - Medical Consumer Version. A deviated septum occurs when the wall between the nasal passages, called the nasal septum, is off to one side. This makes one nasal air passage smaller than the other. A deviated septum might cause partial obstruction of airflow into one or both nostrils and may lead to mouth breathing, which could potentially cause a dry mouth. In the long term, it may exacerbate respiratory issues. 2. Chronic Sinus Infections With improper drainage of the sinuses, a deviated septum creates the perfect environment for bacteria to thrive. Chronic sinus infections may result in facial pain, nasal drip and constant congestion that can wear down your health and productivity ... A deviated septum occurs when the delicate tissue between your nostrils is crooked. A severe one can cause trouble breathing and frequent nosebleeds.