Halitosis or “bad breath” has a number of causes. Food odors, gum disease, tooth decay, stomach problems, sinus problems, and even certain diseases can all cause halitosis. The cures vary. To knock out any possible dental causes, I always advise my patients to have a good cleaning and examination, followed by a review of your at-home oral hygiene regimen. Your dentist can help you figure out the exact cause and treatment. Most mouth rinses can help, but the results will be temporary.