This can be caused by psychological factors, like obsessive compulsive disorder.  It may cause one to misinterpret others’ behaviour as evidence of bad breath, leading to distress, social isolation, and difficulty in treatment.

It can also be caused by damage to the sense of smell. Nearly 200 disorders can cause chemosensory dysfunction that can be interpreted as a bad smell or taste.  Subjective halitosis, perceived only by the patient, can be influenced by various factors such as medication, nutrient deficiencies, and environmental pollutants.

From the desk of Bassel Paul Gebrael DDS, Dip. Perio, FRCD(C), FICD

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