Bad breath smell can come from the nose and the mouth if you have bad tonsils. I forgot what I read but it said something about bad breath through the nose is a systematic problem. If you just have bad breath from bacteria it would only come through the mouth.
If you have bad breath coming out of the nose people could only smell it when you are sitting next to them. But if you talk it would smell further away and you would have a cloud of bad breath around you.
It didn't take me 6-9 months to get my tonsils out. It took a few months. Maybe 3 at the most. I just visited the ent twice. The second time I went he planned the apt with me. Then I got a physical a month before the surgery and they took me off of my suppliments and what not. Then it was surgery day. So it wasn't hard to do.
It really helped my bad breath and nose odor. Now people aren't really bothered with my bad breath anymore.