Mine started nearly 20 years ago, it was awful. I’m convinced a tooth extraction was to blame, as dental work seems to be a common culprit, and it does seem to affect women over 50 in particular. An ENT consultant mentioned it after I’d had a nasoscope done, and apparently there is no cure.
You learn to live with it eventually, and avoid things that aggravate it, such as coffee, alcohol, and nicotine, (difficult for me!), and spicy food.
It seems to eventually go into remission, but does rear its head, especially if you are under stress, so there might be a psychological factor to it too.