Without flossing, plaque and calculus build up on teeth and underneath the gums, creates inflammation of the gums which leads to gingivitis and more serious forms of gum disease. Perhaps you notice that when you floss and/or brush that your gums tend to bleed. If so, this is generally a sign that your teeth are not clean. A visit to your dentist and a proper home oral hygiene regimen can get you back on the right track! If the risk of gingivitis and periodontal disease is not enough, flossing will also help reduce bad breath! If you do not floss regularly, you might notice that when you do floss, a faint (or strong) odor is apparent. These odors are caused by the buildup of bacterial debris (sulfur compounds) between the teeth and underneath your gums. These compounds can contribute to bad breath, whether or not you recognize it.