Gum disease is a condition in which the gums become inflamed and begin to pull away from the teeth. This can lead to bleeding, pain, and eventually tooth loss. Gum disease is usually caused by plaque, a sticky film of bacteria that forms on the teeth. If plaque isn't removed, it can harden into tartar, which is even more challenging to remove. Over time, tartar can irritate the gums and cause them to become inflamed. If left untreated, gum disease can progress to periodontitis, a more severe form of the disease. Periodontitis can destroy the supporting structures around the teeth, leading to tooth loss. Gum disease is preventable through regular brushing and flossing. If you already have gum disease, it's essential to see a dentist so that it can be treated before it causes any permanent damage.