The state of your mouth can offer valuable insights into your overall health. Pain while biting might mean a cracked tooth. Sugar sensitivity usually indicates a cavity. Tenderness to cold might just need a change of toothpaste. Tenderness to hot is likely to be more serious. Bad breath can be caused by poor oral hygiene. A good electric toothbrush, flossing and scraping your tongue all help. Throat infections also cause bad breath. Don’t assume that problems will resolve by themselves. See a dentist at least once a year. Remember: You don’t have to floss all your teeth, just the ones you want to keep!