Is halitosis contagious?

No: Seek a definitive diagnosis on the etiology of halitosis and yes there is certainly a cure for it.

Depends on the cause: Depends upon what is the cause. Three common causes of halitosis that are not contagious: 1) sinus infection 2) stomach acids (heartburn) 3) improper brushing of teeth and tongue. Halitosis due to gingivitis or periodontitis is contagious. Avoid kissing and sharing utensils. Tip: parents should never share spoons and forks with toddlers because you could give them cavities.

No: Halitosis or bad breath by definition is: when noticeably unpleasant odors are exhaled in breathing. So when you exhale on someone, they may never get closer to you.... But it is not a disease, so it is not contagious.