I have bad smell from mouth from last 5 years. I got rid from two cavities 2 years back and these cavities had been for 1-2 years in my mouth. I had one of these cavity-tooth root canaled with a ceramic cap and after 7 days I found a black line at the bottom of it. I have some stains on my teeth. I went to the dentist for bad smell but he said that everything was ok. But from last year I experience that everyone covers their noses when I go near them no matter whether I speak or not. I doubt that bad smell is coming from my nose also. I went to ENT doctor but he also said that all was ok. What should I do now.