@zaa I have the same problem. As long as I can remember I have always had problems breathing through my nose. Mostly it's the right side of my nose that is blocked and hard to breathe through. I was diagnosed with obstructive sleep apnea a couple of years ago and have had some difficulty with the face masks due to breathing mostly through my mouth.

I have been using a nasal wash every so often in the evenings which is a 50-50 chance of clearing the nose. Sometimes it works and sometimes it doesn't clear up after using the nasal wash. I had been thinking about a septoplasty for a couple of years to correct my deviated septum but I wanted to learn how bad it really is and what my options were. I talked with my primary care doctor who gave me a referral to a Mayo ENT doctor for a consultation. I met with the ENT doctor and PA Monday and discussed the options available to me. After the exam and the little camera they poke in your nose and record a little movie they were able to explain what they thought was causing the blockage and what my options were. He also mentioned I have a longer nose and one of the options to fix the issue is to open the nose and do reconstruction. He mentioned that I have a couple of small bone spurs and enlarged turbinates which could be reduced in size to help as an option. Then he went through the risks and no guarantees talk about what the surgery involves. He also explained that they have had success with more conservative treatments using a special Mayo proprietary nasal spray compounded in their pharmacy.

I opted to try the conservative treatment for 90 days to see if it helps before considering surgery or just living with it. They gave me a Neilmeds sinus rinse starter kit which I already had one at home. I have to use it twice a day, once in the morning and once at night. After rinsing I have to use 2 sprays in each nostril of the Mayo spray which contains Mometasone to reduce inflammation, Ipratropium to reduce nasal drainage and Diphenhydramine which is an antihistamine to help reduce nasal drainage. I started using it Tuesday and was pleasantly surprised with the results. I can breathe through both nostrils freely now and it seems to be helping with my CPAP. At 78 years old I really don't want surgery unless it's a last resort and will help quality of life. I would have never guessed the Mayo proprietary nasal spray would have worked this well as I have tried all of the normal nasal sprays with no help at all. I'll know for sure in a couple more months.

I would definitely have a meeting with an ENT specialist if you have not already seen one.