I was wondering what are the main causes of bad breath and how should i avoid it?

Bad Breath: Main cause is usually poor oral hygiene. See the following website for more information on medical and dental causes as well as help preventing and eliminating it. Start with a visit to your dentist for an evaluation. http://www.smilesapartcosmeticdentist.com/fresh-breath-control.htm.

Many causes...: Bad breath or halitosis, can have several causes, and it is sometimes multi-factorial. Accumulation of plaque ; tartar in between ; behind the teeth, ; presence of cavities are common causes. Also, many people have more accumulation of germs and debris on top surface of their tongue (to be brushed daily too). Others:presences of "post nasal drainage", acid reflux/ digestive problems ;.