If it does, keep on rinsing for several days after the odor
disappears, or it grows back.
If the infection
has gone higher up in your sinuses, the only thing that seems to get rid of it is a Flip-Turn Sinus Flush.
It's kinda risky because you have to bend over, preferably in a shower, but you can also do it outside in a bathing suit.
My dentist applied an antibiotic to my gums when I had gingivitis, rather expensive, but worth it.