“…The back of the tongue is a potential reservoir of bacteria and source of foul-smelling gases; therefore, daily washing should be performed to reduce the number of bacteria and the processes leading to the manifestation of foul smells [9][10][11][12]. Extraoral factors not related to the oral cavity include intake of maltogenic foods (such as garlic, onions, fatty foods, sugars and sweets, which can promote the development of caries and the production of substances with an unpleasant smell), smoking and alcohol, coffee abuse, metabolic disorders (such as liver failure, diabetic ketoacidosis, cirrhosis, renal failure, hiatal hernia), upper respiratory tract disorders (chronic sinusitis, nasal obstruction, nasopharyngeal abscess) and lower respiratory tract disorders (i.e., bronchitis, pulmonary abscess, lung cancer) [3][4][5][6][7][8][9][10][11][12][13]. Studies in the literature allow us to identify how halitosis has a significant impact on the life of the individual.…”