Background: Halitosis is defined as unpleasant odor from the mouth .In %87 of cases the cause of halitosis are located in the oral cavity. It is a medico-social problem that affect a many number of people. purpose of this study was to determine factors involved in halitosis patients were referred to the dental clinic Zahedan.

Materials and Methods : 320 people were attending the halitosis or halitophobia for this survey were selected . Selected individuals from eating, drinking, smoking, chewing gum, about 24 hours before sampling was forbidden , and also noted that on examination of brushing, flossing and mouthwash brands do not use . Regarding gingival index periodontal used, in terms of smoking were divided into two groups, consumer and non- consumer - reviews decay and bad restorations through clinical examination and bitewing radiography was performed and the diagnosis of patients with the prosthesis or any the corresponding table were recorded . Crowding teeth were considered . Organoleptic method was used to check for bad breath .

Results: The findings of factors such as tooth decay (72%), periodontal disease (47.5%), tounge  coating (17.5%) are artificial teeth (13.75%) and food impaction, were signficantly  related with halitosis.

Conclusion: diagnosis and treatment of halitosis are pramily the responsibility of dentists.

It is important for the dentist to have a proper understanding of halitosis and provide correct treatment.