Hi Diane,
I am suffering from the same symptom (PUTRID odor in my nose) and I found your post. I'm wondering if you ever found out the cause? I recently (1 month ago) had sinus surgery for chronic sinusitis, and my primary care physician seems to think that after looking at my x-ray, I have another sinus infection, and now that I had the surgery - I can smell much better - and I am actually smelling the infection. It is so distugusting I want to throw up every minute of every day. I started on antibiotics just today, so I have to wait to see if it helps. I was curious to see how you are making out?