If you are looking at natural remedies, I would suggest a mixture of honey, ginger juice, and basil juice. An old Indian lady (a former landlady) suggested this to me since I would suffer from an irritating cough every year during the onset of winter. This remedy helped me a lot. But I still have to...

You can look into nasal irrigation. My nasal bone is slightly deviated, because of which I often had a blocked nose that started affecting my sinuses. My condition would get worse in winters due to the cold winds. I had to start checking the weather on apps like climacell before I went out. But nasa...