After you brush your teeth tomorrow morning, take another minute or two to look inside your mouth. Look at your tongue – color and texture changes or sores could indicate a variety of problems from iron deficiencies to oral cancer. Then check out your gums. The same sorts of things that show up on your tongue can show up on your gums. Color changes, puffiness and bleeding, for example can indicate anything from gum overgrowth from medications to gum disease or the first signs of Diabetes. If your teeth have begun to wear down, change color or crack, it could indicate anything from stress to gastric reflux to nutritional deficiencies.