Family, hi, and welcome to the forums! Flonase can cause the itching all by itself (my daughter took it for awhile and experienced it), and when coupled with various other meds, it can get very severe. We eventually had to ask her doc for another med for her nasal condition. that seemed to do the trick. Flonase does have a number of side effects that the manufacturer doesn't like to talk about. I'd suggest another nasal med, there are other good ones.

I wish you the best, and let us know how this turns out.

Greg