Hi Sir, I am 29 years old and having DNS from my school days. The deviation has increased now and seems to be harder now. From last 3-4 years, I am having difficulty in breathing while lying down, especially during night and its not easy to sleep when I suffer from cold. I consulted an ENT in Bangalore and he suggested surgery as the only solution. He told I have a triangular deviated septum in my right nostril and asked to take a CT scan for further analysis. Do we really need to take a CT scan prior to this surgery for any clarifications? Also, I often used to get headache near my left eye mostly. Is it anyway related to DNS? Expecting a detailed answer for the above queries. Thanks in advance.