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Oral malodor is one of the major growing concern of patients today as it is fundamental to their overall personality. Although the majority of malodor is of oral origin, there are multiple other systemic causes that have to be addressed. Correct diagnosis of the cause of the malodor and prompt treatment can render the patient satisfied. There have been newer developments in faster and more efficient detection of the levels of malodor, and an array of treatment options are present in the market today. It is crucial for the dentist to have a sound understanding of this prevalent oral condition and provide effective intervention programs. This article reviews the various causes and the diagnostic modalities which will help us treat this multifaceted condition.