Quality of life (QOL) questionnaires (such as SNOT20- sinonasal outcome test) are common in medicine, however no such questionnaire exists for halitosis. We devised a specific QOL questionnaire for halitosis. This questionnaire consists of 20 questions covering functional limitation, physical discomfort, psychological discomfort, physical disability and social disability. The answers will be based on a common scale of 5 answers depending on the severity and ranging from a never bothering symptom to a symptom which as worse as can be. Formulation of this a questionnaire can assist in measuring subjective halitosis with change observed over time or with intervention.