Gingivitis is inflammation of the gums, or gingiva, accompanied by any combination of pain, swelling, and a tendency to bleed. If the inflammation is left untreated the teeth may become loose or fall out. The most common cause of gingivitis is the accumulation of dental plaque as a result of poor dental hygiene. Gingivitis may also be caused by ill-fitting dentures, vitamin C deficiency disease, known as scurvy, or generalized inflammation of the mouth (stomatitis). It may also result as a complication of diabetes, leukemia, or pregnancy. While most cases of gingivitis are responsive to improved oral hygiene, cases in which the gums become tough and fibrotic may require removal (gingivectomy) of the inflamed tissue.
If left untreated, gingivitis can advance to periodontitis. At this point, the bone and tissues around the teeth begin to be destroyed. Periodontitis is a progressive disease that can lead to further destruction of the bone and tissue supporting the teeth.
It's important to have gingivitis evaluated and treated by your dentist and dental hygienist. This may involve removal of plaque and calculus that has built up at the base of your teeth. If gingivitis is ignored and its treatment neglected, it can lead to more serious trouble called periodontitis (literally "inflammation around the tooth"), formerly known as pyorrhea. This long-term infection can eventually lead to loss of teeth.
The best means of preventing gingivitis is good dental hygiene, including regular brushing and flossing of your teeth and periodic professional cleaning to prevent build-up of plaque and calculus. Diet is an important factor in sustaining good oral health. The avoidance of simple sugars is the place to start.