Is hallitosis contagious?

No: There are many causes of bad breath, both of dental and medical origin. Find the cause(s) and treat them and then maintain good oral hygiene. By far the most common cause is poor oral hygiene. See the following website for more information: http://www.Smilesapartcosmeticdentist.Com/fresh-breath-control.Htm.

Aren't contagious: The cause of 95%t of all cases of halitosis is bacteria. Luckily, nearly all oral bacteria cannot be spread from person to person. See your dentist for Halimeter test, diagnosis and bad breath treatment.