Thanks for your enquiry about the left nasal blockage that has been troubling you for so long.
Ideally, you would need a proper examination of the inside of your nose with a flexible nasal endoscope to check if the main central bone in your nose might be crooked or deviated (deviated nasal septum). This is a safe, short and painless procedure we do very frequently at our clinic.
We also need to make sure that there are no growths or tumours hiding inside your left nasalnpassage which could explain the persistent left-sided blocked nose. We would check both sides of your nose as well as the back of your nose too.
Sometimes, constant trails of thick mucus can irritate the nose and lead to inflammation and swelling of the soft tissue which could block your nose.
When you come down with the flu, this makes the situation even worse if you already have a narrow left nasal passage as the flu usually tends to lead to more mucus secretions being produced and swelling of soft tissue.
Hope the above helps.
