Secondary infections cause bad breath... halitosis! That IS what we are referring to. Infections in your sinuses cause all kinds of issues. The nasty infection builds up then infected mucus drips down the back of your throat spreading the infection. The infection can be bacterial and fungal/yeast/Candida at the same time. Antibiotics kill the bacteria and leave the fungus/yeast/Candida. When yeast ferments it smells like rotten eggs... read about it on beer brewing sites. Same thing! You can have yeast in your throat and esophagus and not know it. Sometimes it looks like little white patches at the back of your throat or can be a white coating on your tonsils. I’ve had doctors swab my throat, but they never find yeast/Candida, but it was there. Since it was there, it went into my stomach and intestines. Herbal antifungals are not powerful enough to eradicate the infection, but it helps to start the process. If your issue is anything like mine, you will need antifungal oral gel for your mouth and throat as well as an antifungal nasal spray. Use it for 2-4 weeks and the smell and fungus/yeast/Candida should be gone. In some cases, it needs to be used for a longer time. You will know when you try to drink orange juice or something sweet and it doesn’t smell disgusting or putrid. I would drink water out of a bottle and sniff the opening which smelled like dog breath or worse. This is my experience and it was at least a 10 year experience of personal research. Only been documenting for the last 4 years and it’s done... I hope!