Woodworking is often a dusty business. There is sawdust that gets through the mask or the quick sanding job that seems to justify not taking the 10 seconds it takes to put on a mask. My shop also has a certain amount of dust that is almost always present and this often gets stirred up and released into the air. This leaves my nose and sinuses to do the work of filtering out the dust.
I don’t think I’m alone in this.
I also have seasonal allergies that can clog up my sinuses and leave me feeling as if in a fog. This is not a good state to be in when working.
Nasal irrigation has helped provide a lot of relief from the above symptoms. It has helped me and maybe it will help you. The basic procedure is to use some type of device that lets you pour salinated water through your nose.
Please keep in mind that I am not licensed to do anything to anyone nor am I offering medical advice. I am just suggesting that you look at the following articles that may help you keep your nose clean in regards to all the stuff you inhale in the shop and the environment in general. Some of the articles will suggest devices, formulas to make the proper saline mixture, etc.
The Mayo Clinic has an video explaining a method of nasal irrigation. I imagine the folks at the Mayo clinic know what they are talking about.
NPR has an article and audio piece on using a traditional nasal irrigation device called a neti pot. This is the method I use.
And finally, Wikipedia has an article with links that can help you learn more than you ever wanted to know about keeping your nose clean.