The kiss. The smile. The breath. What’s most important to you (and to your significant other)? Chances are it’s good breath.

Let’s get personal. Bad breath (halitosis) may be common in dogs -- but for people, bad breath affects how you feel about yourself, not to mention how others perceive you. In fact, you may not know you have halitosis until a brave friend tells you.

How can you tell if you have bad breath? A simple way is to stick a clean finger in your mouth and scrape saliva from the back of your tongue. Put it on the back of your hand, wait a minute, then smell your hand. Is it something you’d want to kiss?

 If not, check out these 15 tips about causes and cures for bad breath. Start freshening your breath today!

5 Common Causes of Bad Breath

1. Blame bacteria for bad breath. Bacteria breed inside your mouth. These micro organisms lurk between your teeth and cover your tongue. When bacteria stagnate, they multiply and give off toxins and stinky odors.

 2. Say "Ahhh." The deep holes in your tonsils, called crypts, are a common cause of halitosis. If your tonsils are too wide and pitted, a cheese-like smelly substance collects in these holes. These nuggets sometimes smell, and may cause bad breath.

 3. Pungent foods and bad breath. Foods such as onion, garlic, and fish can cause bad breath -- even hours after you brush your teeth.

4. Bad habits = bad breath. Any type of smoking (cigarettes, cigars, pipe) or chewing tobacco can leave you with a really nasty taste -- and smell -- in your mouth. 

5. Tummy troubles. Sometimes GI problems such as GERD or an ulcer can cause bad breath when you burp and gas is released. Also blame low-carb diets, which cause ketosis, a fat-burning state in the body that produces dragon breath.