The state of your mouth can offer valuable insights into your dental, oral and overall health. Any bleeding when you brush your gums is a sign that you should see your dentist. Unhealthy gums can affect your overall health. Atherosclerosis, clogging of the arteries, has a strong link to gum disease. Pain on 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. The only way to find out, for sure, what’s going on is to see your dentist.