Gingivitis is a very common dental problem. In fact, gingivitis affects about 90% of all adults at one time or another. Gingivitis can cause bad breath, bleeding gums and mouth pain, and if left unchecked can eventually lead to serious periodontal disease. Once gingivitis has led to periodontal disease, victims are at risk of tooth loss and even heart disease. Gingivitis, quite simply, is a non-serious form of gum disease. It is mild, or non-serious in its early stages but can lead to more serious periodontal disease. Gingivitis has been known to cause swelling of the gums, but in many cases it is so mild that Gingivitis can be totally unperceived by you. The main cause of Gingivitis is Plaque, an invisible, sticky film, composed primarily of bacteria, that forms on your teeth when starches and sugars in food interact with bacteria normally found in your mouth.