Hello, The other common concerns would be your diet, dry mouth and tongue coating. Other systemic concerns are possible. An example would be ketones expelled from the lungs. This could be a symptom of diabetes. Make sure you have an up to date blood test to look for any irregularity. Closely evaluate your diet. Rule out deficiencies or excesses. Balanced vitamins are a necessity. Keep well hydrated. Eliminate foods known to be associated with strong odors such as garlic and other spices. Avoid irritants such as smoking. You can use a process of elimination and look for results on your own concerning your diet. Make sure you are practicing excellent daily oral hygiene. If you have a dry mouth, plaque may be more difficult to remove. You should include brushing your tongue in your daily routine. You can use a toothbrush or a scraper designed for the tongue. Flossing removes the debris from inbetween your teeth. Your techniques must be effective. Ask your dentist if there are any other tools or rinses you can use for improvement. Sometimes a prescription rinse such as Chlorhexidine gluconate may be suggested. Thank you for your inquiry. I hope my suggestions are helpful and result in some improvement. I am available for any additional questions.