Hi @dailysufferer – interesting that you mentioned your sinuses as a possible source. It reminds me of my husband’s very bad breath years ago. Same thing- it would fill a room, nauseating. He had no idea of this problem. I had to bring it up because I’m sure it was not different at work. He first went to see an ENT and was diagnosed with chronic sinusitis- he did not have many symptoms except for post nasal drip. He was put on antibiotics for 6 weeks and that smell has not returned.