Bad breath, chronic halitosis, is caused by many innocuous things that do not indicate a health problem.  For example, eating a great tasting food that contains a great deal of garlic may cause bad breath.

Preventative Maintenance

There are many health professionals who state that germ and bad breath fighting liquids such as Listerine are bad for a person because they also kill the good bacteria that are in a person's mouth.  Then there are other health professionals who state that this is a short-term affect where the benefits justify the short-term loss.

It should be obvious that regular brushing of teeth, along with flossing, are an absolute tenants and requirements for good health.  If these two alone do not maintain good gum and teeth health then gargling with antiseptic mouth products such as Listerine should be considered.

Maybe an Indicator

By some studies, bad breath that has nothing to do with a recent meal may be a symptom of a health problem.  Bad breath that is persistent and long term may be the indication.  This is a list of recent findings, where the reader should consult their Doctor to confirm any possibilities.  By no means is this list a guarantee of a health problem! 

Bad breath may be an indicator or result of:

1. Cavities or gum disease.
2. A bad respiratory infection that has a source in the sinus or throat.
3. An acidic odor may be caused by Diabetes, which is called ketoacidosis where the person's body is excreting offensive smelling ketones because of the lack of insulin.  This can be very serious and precursor warning.
4. Being out of shape and not physically active may lead to excessive amino acids which encourage bacterial growth.
5. Having an excessively dry mouth caused by an alcoholic drinking problem.  Alcohol causes is a dehydration of the body which makes a person's mouth susceptible to having bacteria growth. 
6. Acid reflux and Gastroesophageal reflux disease may create a condition where the food digestion is impeded, and a form of decaying can occur.
7. Kidney or Renal Disease will potentially cause a fishy type smell in the breath.
8. Lung cancer may cause a bad smell.

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