Bad breath can be caused by the following:

• External factors – foods such as onions and garlic, beverages like coffee and alcohol, and smoking
  
• Poor oral hygiene – where plaque and food debris is left on the teeth
  
• Dentures – plaque and food debris can form on dentures, which need to be cleaned daily
  
• Tonsils – cryptic areas (crevices) in the tonsils can allow food debris to become lodged in the tonsil area
  
• Respiratory tract infections – throat, sinus and lung infections
  
• Dry mouth (Xerostomia) – can be caused by salivary gland problems, medication, mouth breathing, radiation therapy and chemotherapy

Who Should You See If You Have Bad Breath?

If you believe your diet is causing bad breath, then consult with a dietician or nutritionist who can work with you to modify your diet. If you have poor oral hygiene and are suffering from gingivitis (inflammation of the gum tissue in your mouth) or have periodontal disease (bone loss around the teeth sometimes referred to as “pyorrhea”), consult your dentist and periodontist and work with your dental hygienist to improve gingivitis and thorough oral hygiene instruction at home.

The tonsils and respiratory infections will need to be followed by your physician or a specialist such as an ear, nose and throat physician or pulmonologist. A large majority of people in the United States are suffering from dry mouth due to medications they may be taking, salivary gland dysfunction and those who may be going through radiation and chemotherapy treatment for cancer therapy.