If the mouth is believed to harbor the suspected source, then the oral cavity should be examined carefully for poorly fitting dental work, periodontal disease, glossitis, tooth abscess, and tonsillar disease. The salivary glands should be checked for free flow of clear saliva in adequate volumes. Pulmonary disease and metabolic dysfunction are important to consider when the oral cavity and sinus tracts appear normal. Treatment Treatment should be etiologic. Trying to mask the odor is far less effective than addressing its etiology.
Mouthwashes are a poor substitute for good oral hygiene.
Despite advertisements to the contrary, mouthwashes do little to suppress oral flora. Oral hygiene is particularly important in the elderly. Patients should be encouraged to floss and brush regularly, which help remove trapped food particles and promote healthy gums.