Bad breath treatment Sometimes called halitosis, bad breath is usually caused by unhealthy habits like smoking and in-taking of alcohol and the food items that you eat poor oral hygiene habits, infections that occur in the mouth. Other culprits include respiratory tract infections, dry mouth, systemic diseases such as kidney, diabetes, lung and liver disease and gastrointestinal issues, which may include acid reflux and other stomach digestion problems. Signs and Symptoms of Bad Breath Bad breath odors may vary, depending on the source or the underlying cause. Some people worry too much about their breath, even though they have no mouth odor or little odor or while others have bad breath and they don't know it. The underlying symptoms can be poor oral hygiene caused by the food debris, dental plaque and development of gingivitis. Because it's difficult to assess how your own breath smells, try to smell your breath by placing your hand over your...