Ask a trusted person if your breath smells bad
Lick the inside of your wrist, let it dry, then smell it
Floss between your back teeth, then smell the floss
Scrape the back of your tongue with a spoon or tongue scraper, then smell it
Cup your hands over your mouth and nose, breathe out, and smell your breath
Check if you often have a bad taste in your mouth
Notice if your mouth feels dry often
Notice if you have a coated tongue
Notice if people step back when you talk
Notice if you frequently need mints, gum, or mouthwash
Notice if you have gum bleeding, tooth pain, or food stuck between teeth
Notice if bad breath is worse in the morning or after long periods without eating
See a dentist if the smell keeps coming back or does not improve