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► Health Information LibraryIn-Depth ReportsSeptal deviation

Septal deviation

The septum that separates the two sides of the nose is usually straight. If the septum is not straight but shifted to one side, it is known as a deviated septum. A deviation in the septum of the nose can cause narrowing of the nasal passage, lessening the amount of secretions that can drain, sometimes leading to sinus infections.