Halitosiphobia 

A fear of having bad breath.

Bob chews on breath mints all day long due to his halitosiphobia.

Halitosiphobia by Alex Final July 25, 2012

Halitophobia 

The irrational fear of bad breath.

I have halitophobia. I'm a halitophobic. I'm not so much afraid of ME having bad breath, I'm afraid of OTHER PEOPLE having bad breath.

Halitophobia by freakishlyyours February 18, 2010