Halitosis, most commonly known as bad breath, is one of the most common oral conditions around. All of us will experience some kind of bad breath in our lifetime. Some of us will experience halitosis on a more regular, or even chronic, basis. Fortunately, most cases of halitosis are temporary. However, in some cases halitosis is indicative of more serious medical problems. So how can you know if your halitosis is serious or not? Here are some hints on how to find out if you are experiencing halitosis as a result of a more serious underlying medical condition.