Hi and thanks for the query, I suggest you might another proper clinical review. Bad breath could originate from the head, nose and throat sphere, from the lungs and from the gastro intestinal tract. Chronic sinusitis and other infections in the ENT sphere could lead to bad breath. In the lungs, an infection such a lung abscess, at times not known to the patient, could have bad breath as the main revealing symptoms. In this case, a chest X ray usually gives a clue to diagnosis. Poor digestion could cause bad breath too. A stool exam, clinical evaluation and an abdominal ultrasound could be very useful. Psychological component is an important consideration too. I suggest a proper evaluation by an internist. Kind regards, Bain LE, MD.