The swelling of the gums is in fact a very serious issue that should be addressed if any sign of it arise because it can be an indicative warning that you are already under attacked by gum disease. Leaving swollen gums untreated can cause the start of something more serious that in the end there is a gradual destruction in the structures of your teeth and gums. Plaque is the root of all dental issues including swollen gums and gum disease. Plaque refers to that sticky film of bacteria that covers your teeth and gums and that hardens into tartar when not removed by brushing and flossing. Bacteria is found in plaque and it constantly forms on teeth after eating and produces acids that attack your mouth, leading to all kinds of dental issues which includes cavities, bad breath and gum disease.