###Human: Can deviated nasal septum cause difficulty in breathing? ###Assistant: Hello. Having read through your query, I can understand your concern. Patients with DNS can have nasal obstruction on both sides. First, because the septum can deviate in an S-shape giving rise to obstruction on both sides. Second, on the side opposite to DNS, there may be enlargement of another structure called Inferior turbinate secondary to DNS. This is called paradoxical obstruction. Third, excessive use of sprays can lead to mucosal atrophy or thinning and a subjective feeling of an obstruction. You may share your CT to guide me further. You should go for surgery. It is a minor procedure that can be done even under local anesthesia.