Be sure to see your dentist at least twice a year for regular checkups and professional cleaning. Your dentist can spot and treat bad breath causes such as gum disease.
Ask about other potential solutions for halitosis. For example, for dry mouth, your dentist might recommend artificial saliva. Also talk to your dentist before buying products for controlling bad breath.
Go over a list of your medications with the doctor to see if any of them could be contributing to the problem.
If nothing seems to help, the dentist may refer you to a doctor to see whether an underlying health problem could be the cause.