5mm deviation of the nasal septum to the left?

So?: What matters is not the deviation itself but rather its consequence. Does it cause headache or difficulty reaching?

Deviated septum: A deviated septum is not an uncommon problem. It describes a situation when the cartilagenous/bony wall that divides the two nostrils is not midline. It can lead to nasal obstruction, snoring & even sinus issues. You only need surgery if you are having symptoms.Be sure to have your nose evaluated by a board certified otolaryngologist.