Bad breath, or halitosis, results due to improper oral hygiene, but can also be due to residual food particles, gum problems, a draining sinus or systemic problems like respiratory or gastrointestinal problems. Correct brushing which comprise brushing of tongue, cheeks, and the palatal area will eliminate bacteria and residual food particles. Flossing kicks off the collected bacteria, plaque and food particles that have got stuck between teeth. Mouth rinses can bring about only a temporary cure to bad breath. You need to inform your dentist and/or physician if the same condition continues.