Thank you for your question, most common causes of problems with nose breathing are polyps, hypertrophy of turbinates, allergy.. If you have this problem for long like more than 3 months then it is best that you see an ENT specialist for clinical evaluation. In most cases these symptoms can be controlled with anti allergic medicine unless polyps are very large.
You are welcome. Thank you.
I suggest if you have these symptoms in cold or winter more than in the summer, then this is allergy. Benadryl for 5-7 days at night will help. If symptoms persist despite this medicine then it is best to seek ENT doctors care for simple clinical exam of nose. Thank you.
Yes, it will help, it is never too late.
Most ENt surgeries are low risk and it is never too late, nowadays they do it endoscopically called FESS.
Have a nice day.