Simple Way To Tell If You Have Bad Breath

First wash your hands with an odorless soap. Then lick the back of your hand and let the saliva dry for five seconds. Then take a whiff.  If you can smell sulfur compounds,  then brush your teeth, tongue and the back of your mouth. If you have chronic bad breath, brush your teeth twice daily in the morning and before bed.
Also, make sure you use a tongue scrapper available from drug stores. Also, make sure you use a blue colored  mouthwash that  contains zinc chloride. Good brands are Smart Mouth and Pro Fresh.  If  bad breath persists,
ask your dentists to check for gum disease, sinus infection, chronic nasal drip or mouth breathing.