This happened to a child of a friend of mine. The mother could smell something coming from the child's nose. She took him to the nose dr and he checked and he had something lodged in his nose. She said when they took it out, the smell filled the whole room, it was that bad. Now I'm not saying this is your problem but just something to consider. Another thing, could it be your breath and not your nose. My son has really bad breath. My daughter and I tell him this but he said we are the only 2 who notice this. His wife and friend tell him that they don't smell anything. I can't believe they cannot. My daughter told me one night that another friend of his told him right in front of my daughter that his breath was bad, so we are not imagining it. Could it be perspiration ? Hope this all helps.