I have CFS since many years. At the same time as I got ill in CFS I began to experience a bad breath that I never had felt before. I still have bad breath with a distinct caracter every time I have increased symptoms of CFS. When I feel better it disappear. I think that this can be caused by an ongoing viral (XMRV?) infection in the lymphoid tissues in the throat. Anyone else having this symptom with recurring bad breath?