Avoiding all dairy can help, but unfortunately sinus issues can be caused by mold, dust, & all sorts of things.

The air in your house can be worse than outdoors at times.

Thank you guys for your help. Do either of you have air purifiers in your home? If so, any thoughts?

I’ve got 2 hepa filters with charcoal filters, wish I had more but they can be expensive. It helps with smell and does make a difference if your house is dusty a day have dogs or cats. If it freezing out side ya gotta keep the windows closed, in winters we have a larger humidifier as well because it get too dry in the Rockies