While the eyes may be the window to the soul, your mouth is a window to your body's health. The state of your oral health can offer lots of clues about your overall health. Oral health and overall health are more connected than you might realize. Your oral health is connected to many other health conditions beyond your mouth. Sometimes the first sign of a disease shows up in your mouth. In other cases, infections in your mouth, such as gum disease, can cause problems in other areas of your body. Your mouth is normally teeming with bacteria. Usually you can keep these bacteria under control with good oral health care, such as daily brushing and flossing. Saliva is also a key defense against bacteria and viruses. It contains enzymes that destroy bacteria in different ways. But harmful bacteria can sometimes grow out of control and lead to periodontitis, a serious gum infection. When your gums are healthy, bacteria in your mouth usually don't enter your bloodstream. Howev...