Deviated septum

[Couch Potatoe]

Disorder of the nose involving displacement of the nasal [septum]. A condition in which the [cartilage] that divide the nasal cavity in half is [off center] or crooked!

[Dorothey Allen]

Deviated septum is a condition in which the nasal septum is bent or off center, causing one nostril to be smaller than the other.
Inside the nose is the nasal cavity, which is divided into two passages by the nasal septum. The nasal septum is composed of both bone and cartilage and extends from the nostrils to the back of the nose. Usually, the nasal septum is straight, lying about in the middle of the two nostrils. Occasionally, it may be bent (deviated) because of a birth defect or injury and positioned so that one nostril is much smaller than the other. Most people have some minor deviation of the septum so that one nostril is tighter than the other.